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C
ONSTRUCTIONMASTER
®
C
ONCRETECALC
™
P
RO
ADVANCED FEET-INCH-FRACTION CALCULATOR
Model 4225
Designed for today’s concrete professional,
the all-new
ConcreteCalc Pro
adds even
more power to the already powerful
Construction Master
line-up. Like earlier
models, this calculator is so simple to use,
even the novice user can easily solve
dimension-related problems.
•
Solve Dimensional Math with Ease
•
Dimensional Conversions
•
Imperial/Metric Conversions
•
Weight/Volume Conversions
•
Rectangular Area/Volume Calculations
•
Block Quantity Solutions
•
Footing Volume Calculations
•
Instant Square-Up (Diagonal) Solutions
•
Drop Distance Calculations
•
Circular Area and Circumference
•
Arc Length Calculations
•
Calculate Stair Risers, Treads, Stringers
and Inclination Angle
•
Material Estimations
•
Paperless Tape
CONCRETECALC™PRO
GETTING STARTED...............................1
Key Definitions.....................................1
Preference Settings...........................11
Entering Dimensions .........................13
Conversions.......................................14
Basic Math Operations......................16
Percentage Calculations....................17
Memory Operation .............................18
Paperless Tape ..................................19
USING THE CONCRETECALC PRO ...20
Length, Width, and Height Keys........20
Circle Calculations .............................23
Squaring-Up a Concrete Slab ...........26
Calculating Rebar..............................27
Calculating Loads..............................29
Blocks and Bricks..............................30
Polygon (Equal-Sided).......................31
Concrete Footing...............................32
Finding Weight Per Volume...............33
Concrete Bags ...................................33
Calculating Drop................................34
Stair Calculations...............................36
APPENDIX ............................................40
Accuracy/Errors.................................40
Battery and Auto Shut-Off.................41
Default Settings.................................42
Area Formulas...................................43
Surface Area and Volume Formulas..44
REPAIR AND RETURN.........................45
Warranty, Repair and Return
Information.......................................45
WARRANTY..........................................46
TABLE OF CONTENTS
POCKET REFERENCE GUIDE — 1
KEY DEFINITIONS
Basic Function Keys
+ – x Arithmetic operation keys.
÷ =
% Four-function (+, –, x, ÷)
percent key.
0 – 9 Keys used for entering
and • numbers.
O
Off Key
— Turns all power
off, clearing all non-permanent registers.
o
On/Clear Key
— Turns on
power. Pressing once clears
the display. Pressing twice
clears all temporary values.
Ç
Convert Key
— Used with
the dimensional keys to
convert between dimensions or with other keys to
access special functions.
T
Store Key
— Used for stor-
ing values.
®
Recall Key
— Recalls
stored values.
GETTING STARTED
POCKET REFERENCE GUIDE — 2
Unit Keys
y
Yards Key
— Enters or
converts to
Yards
.
f
Feet Key
— Enters or con-
verts to
Feet
as whole or
decimal numbers. Also
used with the
i and /
keys for entering Feet-Inch
values (e.g.,
6 f 9
i 1 / 2
). Repeated
presses during conversions
toggle between Fractional
and Decimal Feet.
i
Inch Key
— Enters or con-
verts to
Inches
. Entry can
be whole or decimal numbers. Also used with the
/
key for entering fractional
Inch values (e.g.,
9 i
1 / 2
). Repeated presses during conversions toggle between Fractional and
Decimal Inches.
/
Fraction Bar Key
— Used
to enter
Fractions
. Fractions
can be entered as proper
(1/2, 1/8, 1/16) or improper
(3/2, 9/8). If the denominator (bottom) is not entered,
the calculator's fractional
accuracy setting is automatically used.
m
Meters Key
— Enters or
converts to
Meters
.
Ç 7
Centimeters
— Enters or
converts to
Centimeters
.
(Cont’d)
POCKET REFERENCE GUIDE — 3
Ç 9
Millimeters
— Enters or
converts to
Millimeters
.
Ç 2
Acres
— Enters or con-
verts to
Acres.
Length, Width and Height Keys
l Enters Length for calculation
of Area or Volume.
W Enters Width and calculates
Area, Square-up and
perimeter.
h Enters Height and calculates
Volume, wall Area and total
room Area. This is a permanent entry; stored value
holds when turned off.
Arc/Circle Keys
A
Arc
— Calculates arc
Length or degree, chord
Length, segment Area, pie
slice Area and segment
rise.
ç
Circle
— Enters diameter
and calculates circle Area
and circumference.
Ç A
Radius
— Enters or calcu-
lates circle radius.
Ç W
Chord
— Enters or calculates the chord Length of a
circle segment.
Ç h
Segment Rise
— Enters or
calculates the rise of a circle
segment.
(Cont’d)
POCKET REFERENCE GUIDE — 4
Construction Project Keys
r
Rebar Key
— Given stored
or entered rebar inset,
rebar size, rebar on-center
spacing and entered Length
and Width values calculates
the following:
Press Result
1 Total Feet
2 Total Weight
3 Rebar Size
4 Rebar On-center
5 Rebar Inset
6 Stored Length
7 Stored Width
If you already know your total linear
Feet of rebar, you can enter the
Length to calculate the total Weight
based on the Weight per Foot of the
stored rebar size (e.g. 1 0 0 f
r r).
Ç r
Inset
— Stores rebar inset
Default is 3 inches. Rebar
inset is the spacing between
the rebar and the perimeter
of the forms or foundation.
R
Rebar Size Key
— Stores
rebar size. Rebar size can be
entered as a number for rebar
sizes 3-11, 14, and 18(e.g., 5
R for number 5 rebar), or
as a decimal or fractional
value not exceeding 6 Inches
in diameter (e.g., 5 / 8
R for 5/8 Inch bar size).
Default is number 5 (5/8”).
POCKET REFERENCE GUIDE — 5
Ç R
Spacing
— Stores rebar
on-center spacing. Default
is 18”.
L
Loads Key
— Calculates
number of loads for a given
Volume or Length, Width,
and Height (Depth) values
and stored load size.
T L
Load Size
— Stores load
size. Load size must be
entered as a cubic value
(e.g., 8 y y y
T L). The default
size is 8 cubic Yards.
Ç 5
Bags
— Calculates number
of concrete bags for a given
Volume and stored bag size.
T 5
Bag Size
— Stores bag
size (Volume per bag of
concrete). Bag size must
be entered as a cubic value
(e.g., • 6 7 f f
f T 5). Default is
0.666667 cubic Feet per
bag, based on a standard
80 pound bag.
B
Blocks/Bricks
—
Calculates the number of
concrete blocks required to
fill a given Area. This key
can also be used for calculating the number of “face”
or “paver” bricks by storing
a brick size (see
Block
Size
).
POCKET REFERENCE GUIDE — 6
T B
Block Size
— Stores the
block size. Block size must
be entered as a linear value
or a square value. The
default is 128 square Inches
block Area and 16 Inches
block Length.
Note: For bricks, you may also enter a brick size
using
T B
. For example, when building
with standard “face” bricks, store a brick size of
21 square Inches (e.g.,
2 1 i i T
B)
or store 32 square Inches (e.g.,
3 2 i
i T B)
for “paver” bricks. This is based
on Modular U.S. brick size of 3-5/8 Inches x 21/4 Inches x 7-5/8 Inches, including 3/8 Inch
mortar = 4 Inches x 2-5/8 Inches x 8 Inches.
ß
Square-Up Key
—
Calculates the “Square-Up”
(diagonal) Length given
entered Length and Width
values.
d
Drop Key
— Calculates
total drop (or fall) over an
entered Length given,
entered percentage drop,
Inch per Foot drop, or
degrees of drop. Continued
presses will act as a “constant add,” for displaying
successive drops.
Ç 8
Board Feet
— Enters or
converts cubic values to
board Feet.
Ç ç
Column/Cone
— Calculates
the Volume and surface Area
of a column and/or cone.
POCKET REFERENCE GUIDE — 7
F
Footing
— Finds quantity
of concrete, based on
entered wall Length and
stored footing Area.
T F
Footing Area
— Stores
footing Area. Footing Area
must be entered as a
square value (e.g.,
2 6 4
i i T F
).The
default footing is 264
square Inches.
Ç l
Polygon
— Calculates full
angle, bi-sect angle, side
Length, perimeter and Area
based on entered radius
and number of sides.
POCKET REFERENCE GUIDE — 8
Stair Layout Key
s Given Height and/or Length
and stored variables,
calculates or displays:
Press Result
1 Riser Height (R-HT)
2 Number of Risers
(RSRS)
3 Riser Overage/
Underage (R+/-)
4 Tread Width (T-WD)
5 Number of Treads
(TRDS)
6 Tread Overage/
Underage (T+/-)
7 Stairwell Opening
(OPEN)
8 Stringer Length
(STRG)
9 Angle of Incline (INCL)
10 Stored or Calculated
Run (RUN)
11 Stored or Calculated
Rise (RISE)
12 Stored Desired
Riser Height (R-HT)
13 Stored Desired
Tread Width (T-WD)
14 Stored Headroom
(HDRM)
15 Stored Floor
Thickness (FLOR)
(Cont’d)
POCKET REFERENCE GUIDE — 9
Ç s
Riser Limited
— Calculates
riser Height
and other stair
values if you’re limited by
local code. The calculated
riser Height will never exceed
the
stored
desired riser
Height.
STAIR DEFAULT VALUES
• 7-1/2” Desired Riser Height
• 10” Desired Tread Width
• 10” Floor Thickness
• 6’8” Headroom
Customizable Stair Settings
T 7 Stores Desired Riser
Height.
T 9 Stores Desired Tread
Width.
T 8 Stores Floor Thickness.
Ç T TSets Headroom.
TT
Miscellaneous Functions
a Backspace Key.
® = Paperless Tape.
Ç T Preference Settings.
Ç ÷
(1/x) Reciprocal
— Finds
the reciprocal of a number
(e.g., 8 Ç ÷ 0.125).
Ç x
Clear All
— Returns all
stored values to the default
settings. (Does not affect
Preference Settings.)
(Cont’d)
POCKET REFERENCE GUIDE — 10
Ç – (+/–) Toggle.
Ç + Pi (π) 3.141593.
Ç • Converts between D:M:S
and decimal degrees.
Ç %
x
2
— Squares the value in
the display.
Ç a ( ) Square Root.
Ç / Exponential Notation (x10y).
Ç 0 Total Cost (based on entry
of per unit cost).
T 0 Weight per Volume –
Stores a new
Weight per
Volume
value.
Note: After entering a value and pressing
T
0
, continue pressing the 0digit key until you’ve
reached the desired Weight per Volume format.
To recall your setting, press
® 0
.
Ç 6
Tons
— Enters or converts
to Tons.
Ç 4
Pounds
— Enters or con-
verts to Pounds.
Ç 3
Metric Tons
— Enters or
converts to Metric Tons.
Ç 1
Kilograms
— Enters or
converts to Kilograms.
µ Memory +.
Ç µ (M–) Memory Minus.
T 1 (M1) Storage Register.
T 2 (M2) Storage Register.
T 3 (M3) Storage Register.
Ç ® Clear M+.
® ® Recall and Clear M+.
® µ, 1, Recall M+, M1, M2 or M3.
2 or 3
POCKET REFERENCE GUIDE — 11
PREFERENCE SETTINGS
Press Ç, then T, then keep pressing
T to toggle through the main settings.
Press the
+ key to advance within sub-
setting. Use the
– key to back up. Press
any key to exit Preferences.
PRESS
Ç AND: SETTING--FUNCTION
First press Fractional Resolution:
of
T
:
--1/16
+ --1/32
+ --1/64
+ --1/2
+ --1/4
+ --1/8
+ --1/16
(repeats options)
Second press Area Displays:
of
T
:
--Std.
+ --0. SQ FEET
+ --0. SQ YD
+ --0. SQ M
+ --Std.
(repeats options)
Third press Volume Displays:
of
T
:
--Std.
+ --0. CU YD
+ --0. CU FEET
+ --0. CU M
+ --Std.
(repeats options)
(Cont’d)
POCKET REFERENCE GUIDE — 12
PRESS: SETTING--FUNCTION
Fourth press Headroom Height Setting:
of T:
--6 FEET 8 INCH
+* --6 FEET 9 INCH
–* --6 FEET 8 INCH
*Press +to increment or –to decrement by
one inch.
Fifth press Exponential Mode:
of T:
--OFF
+ --On
+ --OFF
(repeats options)
Sixth press Meter Linear Displays:
of T:
--0.000 M
+ --FLOAt M
(floating point)
+ --0.000 M
(repeats options)
Seventh press Decimal Degree Displays:
of T:
--0.00º
+ --FLOAt
(floating point)
+ --0.00º
(repeats options)
Eighth press Fractional Mode:
of T:
--Std.
+ --COnSt
+ --Std.
(repeats options)
Note: Press oat anytime to exit the Preference
Settings.
(Cont’d)
POCKET REFERENCE GUIDE — 13
ENTERING DIMENSIONS
Linear Dimensions
When entering Feet-Inch values, enter
dimensions from largest to smallest — Feet
before Inches, Inches before Fractions.
Enter Fractions by entering the numerator
(top number), pressing
/ (Fraction Bar
key) and then the denominator (bottom
number).
Note: If a denominator is not entered, the fractional setting value is used.
Examples of how linear dimensions are
entered (press oafter each entry):
DIMENSION KEYSTROKES
5 Yards 5 y
5 Feet 1-1/2 Inch 5 f 1 i 1 / 2
17.5 Meters 1 7 • 5 m
Square and Cubic Dimensions
Examples of how Square and Cubic
dimensions are entered (press oafter
each entry):
DIMENSION KEYSTROKES
5 Cubic Yards 5 y y y
130 Square Feet 1 3 0 f f
33 Square Meters 3 3 m m
POCKET REFERENCE GUIDE — 14
CONVERSIONS
Linear Conversions
Convert 10 Feet 6 Inches to other dimensions, including Metric:
KEYSTROKE DISPLAY
1 0 f 6 i 10 FEET 6 INCH
Ç f* 10.5 FEET
Ç i* 126. INCH
Ç y 3.5 YD
Ç m 3.200 M
Ç 9 3200.4 MM
Ç 7 320.04 CM
*Repeated presses of for iwill toggle
between Feet-Inch-Fractions and Decimal Feet or
Inches.
Square and Cubic Conversions
Convert 14 square Feet to square Yards:
KEYSTROKE DISPLAY
1 4 f f 14 SQ FEET
Ç y 1.555556 SQ YD
Convert 12 cubic Feet to cubic Yards:
KEYSTROKE DISPLAY
1 2 f f f 12 CU FEET
Ç y 0.444444 CU YD
POCKET REFERENCE GUIDE — 15
Weight Conversions
Convert 25 Tons to other Weights:
KEYSTROKE DISPLAY
2 5 Ç 6 (tons) 25 Ton
Ç 4 (lbs) 50000. LB
Ç 1 (kg) 22679.62 kG
Ç 3 (met tons) 22.67962 MET Ton
Weight per Volume Conversions
Your calculator has the capability of converting between Weight and Volume. The
Weight/Volume ratio is permanently stored
by entering the value and pressing
T
T
0
. The default value is 1.5 Tons per cubic
Yard.
Find the Weight of 15 cubic Yards at 1.75
Tons per cubic Yard, then convert to other
Weights:
KEYSTROKE DISPLAY
1 • 7 5 T 0
1.75 Ton Per CU YD
1 5 y y y 15 CU YD
Ç 6 (tons) 26.25 Ton
Ç 4 (lbs) 52500. LB
Ç 1 (kg) 23813.6 kG
Ç 3 (met tons) 23.8136 MET Ton
Converting D:M:S
Convert 23° 42’ 39” to decimal degrees:
KEYSTROKE DISPLAY
o o 0.
2 3 • 4 2 • 3 9 DMS 23.42.39
Ç • 23.71°
STORED
POCKET REFERENCE GUIDE — 16
BASIC MATH OPERATIONS
Your calculator uses standard chaining
logic, which simply means that you enter
your first value, the operator (+, –, x,
÷), the second value and then the Equals
sign (=).
A. 3 + 2 = 5.
B. 3 – 2 = 1.
C. 3 x 2 = 6.
D. 3 ÷ 2 = 1.5
This feature also makes the calculator
simple to use for dimensional applications:
Adding and Subtracting Strings of
Dimensions
Add the following measurements:
• 6 Feet 2-1/2 Inches
• 11 Feet 5-1/4 Inches
• 18.25 Inches
Then subtract 2-1/8 Inches.
KEYSTROKE DISPLAY
6 f 2 i 1 / 2 +
1 1 f 5 i 1 / 4 +
1 8 • 2 5 i = 19 FEET 2 INCH
– 2 i 1 / 8 = 18 FEET 11-7/8 INCH
Multiplying Dimensions
Multiply 5 Feet 3 Inches by 11 Feet 6-1/2
Inches:
KEYSTROKE DISPLAY
5 f 3 i x 1 1 f
6 i 1 / 2 = 60.59375 SQ FEET
POCKET REFERENCE GUIDE — 17
Dividing Dimensions
Divide 30 Feet 4 Inches by 7 Inches:
KEYSTROKE DISPLAY
3 0 f 4 i ÷ 7 i = 52.
Divide 20 Feet 3 Inches by 9:
KEYSTROKE DISPLAY
2 0 f 3 i ÷ 9 = 2 FEET 3 INCH
PERCENTAGE CALCULATIONS
The % key can be used for finding a given
percent of a number or for working add-on,
discount or division percentage calculations. It can be used with any type of
number, in any dimension (Feet, Inch,
Millimeter, etc) and any type of convention
(non-dimensioned, linear, square or cubic).
Calculating Percentages
Find 18% of 500 Feet:
KEYSTROKE DISPLAY
5 0 0 f x 1 8 % 90 FEET 0 INCH
Add 10% to 137 square Feet:
KEYSTROKE DISPLAY
1 3 7 f f + 1 0 % 150.7 SQ FEET
Take 20% from 552 Feet 6 Inches:
KEYSTROKE DISPLAY
5 5 2 f 6 i – 2 0 %
442 FEET 0 INCH
Divide 350 cubic Yards by 80%:
KEYSTROKE DISPLAY
3 5 0 y y y ÷ 8 0 %
437.5 CU YD
POCKET REFERENCE GUIDE — 18
MEMORY OPERATION
Whenever the µ key is pressed, the
displayed value will be added to the
Memory. Other memory functions:
FUNCTION KEYSTROKES
Add to Memory µ
Subtract from Memory Ç µ
Recall total in Memory ® µ
Display/Clear Memory ® ®
Clear Memory Ç ®
Memory is semi-permanent, clearing only
when you:
1) turn off the calculator;
2) press ® ®;
3) press Ç ®;
4) press Ç x
(Clear All)
.
When memory is recalled (® µ), consecutive presses of µ will display the
calculated average and total count of the
accumulated values.
Example:
KEYSTROKE DISPLAY
3 5 5 µ M+ 355.
2 5 5 µ M+ 255.
7 4 5 Ç µ M- 745.
® µ TTL – 135.
µ AVG – 45.
µ CNT 3.
® ® M+ – 135.
M
M
M
STORED
M
M
M
POCKET REFERENCE GUIDE — 19
PAPERLESS TAPE
The Paperless Tape allows you to display
and review the last 20 entries of a calculation. ® = accesses the tape mode and
+ or – scrolls forward or backward
through the entries.
Note: The Paperless Tape is cleared each time
o
is pressed twice, the unit is shut off, or a Clear All is
performed.
Previewing Paperless Tape
KEYSTROKE DISPLAY
1. Enter a string of numbers:
4 f + 4 FEET 0 INCH
5 f + 9 FEET 0 INCH
6 f + 15 FEET 0 INCH
7 f = 22 FEET 0 INCH
2. Access the Tape function:
® = TTL= 22 FEET 0 INCH
3. Scroll from first value to total:
+ 01 4 FEET 0 INCH
+ 02+ 5 FEET 0 INCH
+ 03+ 6 FEET 0 INCH
+ 04+ 7 FEET 0 INCH
+ TTL= 22 FEET 0 INCH
4. Scroll to last 2 values:
– 04+ 7 FEET 0 INCH
– 03+ 6 FEET 0 INCH
5. Exit Tape function and continue:
=* TTL= 22 FEET 0 INCH
+ 22 FEET 0 INCH
2 f = 24 FEET 0 INCH
*Displays total before exiting.
POCKET REFERENCE GUIDE — 20
LENGTH, WIDTH, AND HEIGHT KEYS
Using the Multi-Function
W Key to
find Area, Square-Up, and Perimeter
Find the Area, square-up and perimeter of
a room measuring 15’ x 20’.
KEYSTROKE DISPLAY
o o 0.
1 5 f l LNTH 15 FEET 0 INCH
2 0 f W WDTH 20 FEET 0 INCH
W AREA 300. SQ FEET
W SQUP 25 FEET 0 INCH
W PER 70 FEET 0 INCH
Using the Multi-Function h Key to
Find Volume, Wall Area and Room Area
Find the Volume, wall Area and total
surface/room Area* if you have a Length
of 15 feet, Width of 20 Feet and Height of
12 Feet.
*Room Area includes 4 walls plus ceiling Area.
KEYSTROKE DISPLAY
o o 0.
1 5 f l LNTH 15 FEET 0 INCH
2 0 f W WDTH 20 FEET 0 INCH
1 2 f h HGHT 12 FEET 0 INCH
h VOL 3600. CU FEET
h WALL 840. SQ FEET
h ROOM 1140. SQ FEET
USING CONCRETECALC PRO
POCKET REFERENCE GUIDE — 21
Volume of a Concrete Slab
Calculate the cubic Yards of concrete
required to pour a slab that measures: 45
Feet 5 Inches long x 13 Feet 6 Inches
wide x 5 Inches deep. If concrete is $65
per cubic Yard, what will it cost?
KEYSTROKE DISPLAY
o o 0.
4 5 f 5 i l
LNTH 45 FEET 5 INCH
1 3 f 6 i W
WDTH 13 FEET 6 INCH
5 i h h VOL 9.461806 CU YD
x 6 5 Ç 0 $615.
02
(total cost)
Complex Concrete Volume
(Cont’d)
A
B
C
27’ 0”
38’ 2”
8’ 6”
9’ 0”
4’ 2”
9’ 6”
POCKET REFERENCE GUIDE — 22
You’re going to pour an odd-shaped patio
4-1/2 Inches deep with the dimensions as
shown. First, calculate the total Area (by
dividing the drawing into three individual
rectangles) and then determine the total
cubic Yards of concrete required for this
job. What is the total cost of the concrete
if it is selling for $55 per cubic Yard?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Find Area “A” and add to Memory:
3 8 f 2 i
– 4 f 2 i = l
LNTH 34 FEET 0 INCH
2 7 f W WDTH 27 FEET 0 INCH
W AREA 918. SQ FEET
µ M+ 918. SQ FEET
3. Find Area “B” and add to Memory:
4 f 2 i l LNTH 4 FEET 2 INCH
8 f 6 i W WDTH 8 FEET 6 INCH
W AREA 35.41667 SQ FEET
µ M+ 35.41667 SQ FEET
4. Find Area “C” and add to Memory:
9 f l LNTH 9 FEET 0 INCH
9 f 6 i W WDTH 9 FEET 6 INCH
W AREA 85.5 SQ FEET
µ M+ 85.5 SQ FEET
5. Find Total Area/Volume and cost:
® ® M+ 1038.917 SQ FEET
x 4 i 1 / 2 = 14.4294 CU YD
x 5 5 Ç 0 $793.
62
M
M
M
M
M
M
M
M
M
(Cont’d)
POCKET REFERENCE GUIDE — 23
CIRCLE CALCULATIONS
Circumference and Area
Find the Circumference and Area of a
circle having a diameter of 10 Inches.
KEYSTROKE DISPLAY
1. Clear calculator and enter diameter:
o o 0.
1 0 i ç DIA 10 INCH
2. Find circle Area and Circumference:
ç AREA 78.53982 SQ INCH
ç CIRC 31-7/16 INCH
3. Convert to decimal Inch:
Ç i 31.41593 INCH
Arc Lengths
Find the arc Length of an 85° portion of a
circle with a 5 Foot diameter.
KEYSTROKE DISPLAY
1. Clear calculator and enter diameter:
o o 0.
5 f ç DIA 5 FEET 0 INCH
2. Enter arc angle then find arc Length,
chord, segment Area, pie slice Area, and
segment rise:
8 5 A A ARC 3 FEET 8-1/2 INCH
A CORD 3 FEET 4-9/16 INCH
A SEG 1.522922 SQ FEET
A PIE 4.636031 SQ FEET
A RISE 0 FEET 7-7/8 INCH
POCKET REFERENCE GUIDE — 24
Volume of a Cylinder
Calculate the Volume of a cylinder with a
diameter of 2 Feet 4 Inches and a Height
of 4 Feet 6 Inches:
Note: For a cylinder, use the Column function.
KEYSTROKE DISPLAY
1. Find circle Area:
o o 0.
2 f 4 i ç DIA 2 FEET 4 INCH
ç AREA 4.276057 SQ FEET
2. Enter Height and find Volume:
4 f 6 i h
HGHT 4 FEET 6 INCH
Ç ç COL 19.24226 CU FEET
POCKET REFERENCE GUIDE — 25
Volume of a Cone
Calculate the Volume of a cone with a
diameter of 3 Feet 6 Inches and a Height
of 5 Feet:
KEYSTROKE DISPLAY
1. Find circle Area:
o o 0.
3 f 6 i ç DIA 3 FEET 6 INCH
ç AREA 9.621128 SQ FEET
2. Enter Height and find Volume:
5 f h HGHT 5 FEET 0 INCH
Ç ç ç ç*
CONE 16.03521 CU FEET
*To access cone Volume, you must press the
ç
key three times after Ç.
Volume of a Semicircular Pad
You want to calculate the Volume of a
semi-circular pad with a diameter of 16
Feet and a thickness of 4 Inches. (Use the
ç
key to find circle Area).
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter diameter:
1 6 f ç DIA 16 FEET 0 INCH
3. Find circle Area:
ç AREA 201.0619 SQ FEET
4. Divide by 2 for semi-circle:
÷ 2 = 100.531 SQ FEET
5. Multiply by thickness to find cubic Yards:
x 4 i = 1.241123 CU YD
POCKET REFERENCE GUIDE — 26
Concrete Columns
Find the total cubic Yards and Tons of concrete (using 1.5 Tons per cubic Yard)
required for three (3) columns, each with a
diameter of 5 Feet 2-3/4 Inches and a Height
of 10 Feet:
KEYSTROKE DISPLAY
1. Recall stored Weight per Volume:
o o 0.
® 0 1.5 Ton Per CU YD*
2. Enter diameter:
5 f 2 i 3 / 4 ç
DIA 5 FEET 2-3/4 INCH
3. Find total Volume:
1 0 f h Ç ç
COL 214.7607 CU FEET
Ç y 7.954101 CU YD
x 3 = 23.8623 CU YD
4. Convert to Tons:
Ç 6 35.79345 Ton
*If it is not 1.5 Ton Per CU YD, enter
1 • 5 T 0
.
SQUARING-UP A CONCRETE SLAB
“Square-up” a concrete slab measuring
45 Feet 6 Inches by 24 Feet 4 Inches.
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter Length, Width and solve for
diagonal Length (square-up):
4 5 f 6 i l
LNTH 45 FEET 6 INCH
2 4 f 4 i W
WDTH 24 FEET 4 INCH
ß SQUP 51 FEET 7-3/16 INCH
STORED
POCKET REFERENCE GUIDE — 27
CALCULATING REBAR
Rebar – Total Linear Feet
Find the total linear Feet of rebar for a 23
Feet x 16 Feet concrete slab, using default
values for Rebar size (No. 5), on-center
spacing (18 Inches), and inset (3 Inches).
Note: Overlap is not included in the calculation.
*Any adjustments for on-center spacing should be
made in the center.
23 Feet (Length)
16 Feet (Width)
3 inch
Inset
#5 Rebar at 18 in. o.c.
On-center spacing adjustment*
POCKET REFERENCE GUIDE — 28
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter rebar size*:
5 R No 5 0.625 INCH
3. Find rebar Weight per Foot:
R No 5 1.04188 LB Per FEET
4. Enter rebar spacing:
1 8 i Ç R
R-oc 18 INCH
5. Enter rebar inset:
3 i Ç r R-IN 3 INCH
6. Enter slab Length:
2 3 f l LNTH 23 FEET 0 INCH
7. Enter slab Width:
1 6 f W WDTH 16 FEET 0 INCH
8. Find rebar total linear Feet:
r RBAR 533 FEET 6 INCH
9. Find rebar total Weight:
r No 5 555.8428 LB
10. Display values used for calculating
Rebar:
r No 5 0.625 INCH
r R-oc 18 INCH
r R-IN 3 INCH
r LNTH 23 FEET 0 INCH
r WDTH 16 FEET 0 INCH
*Rebar size can be entered as a number for rebar
sizes 3-11, 14, and 18 (e.g.,
5 R
for #5 rebar),
or as a decimal or fractional value not exceeding 6
Inches in diameter (e.g.,
5 / 8 R
for 5/8 Inch
rebar size).
STORED
STORED
STORED
STORED
STORED
STORED
POCKET REFERENCE GUIDE — 29
Rebar – Total Weight
How many pounds of #5 Rebar are needed
to layout 100 linear Feet of footings?
KEYSTROKE DISPLAY
1. Clear calculator:
o o
2. Enter rebar size:
5 R No 5 0.625 INCH
3. Enter Length:
1 0 0 f r RBAR 100 FEET 0 INCH
4. Calculate Weight:
r RBAR 104.188 LB
CALCULATING LOADS
How many 8 cubic Yard truck loads would
be needed to haul the dirt from an excavation measuring 108’ x 48’ and 1’ deep?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter load size:
8 y y y T L
L-SZ 8. CU YD
3. Enter site Length:
1 0 8 f l
LNTH 108 FEET 0 INCH
4. Enter site Width:
4 8 f W WDTH 48 FEET 0 INCH
5. Enter site Depth:
1 f h HGHT 1 FEET 0 INCH
6. Find number of loads:
L LOAD 24.
STORED
STORED
POCKET REFERENCE GUIDE — 30
BLOCKS AND BRICKS
Calculating Number of Blocks
You are building an “L” shaped retaining
wall out of standard 8 Inch x 16 Inch
blocks. One side of the retaining wall is
22 Feet long, and the other side is 15 Feet
8 Inches long. The wall is to be 4 Feet
high. How many blocks are required to
build this wall?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter block size:
8 i x 1 6 i =
T B B-AR 128. SQ INCH
3. Add both wall Lengths:
2 2 f + 1 5 f 8 i =
37 FEET 8 INCH
4. Multiply Length times Height:
x 4 f = 150.6667 SQ FEET
5. Find number of blocks and add 5%
waste:
B BLKS 169.5
(170 Blocks)
+ 5 % 177.975
(178 Blocks)
STORED
POCKET REFERENCE GUIDE — 31
Masonry —
Estimating Bricks
How many standard bricks (2-1/4 x 8 Inch)
are needed for a wall measuring 36 Feet 6
Inches long and 8 Feet high?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter brick Area:
2 i 1 / 4 x 8 i =
T B B-AR 18. SQ INCH
3. Multiply wall Length times Height:
3 6 f 6 i 36 FEET 6 INCH
x 8 f = 292. SQ FEET
4. Find number of bricks:
B
(Bricks)
BLKS 2336.
POLYGON (Equal-Sided)
Find the full angle, bi-sect angle, side
Length, perimeter and Area of a pentagonshaped patio to be paved with bricks. The
radius is 7 Feet 5 Inches and the number
of sides is five:
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter radius:
7 f 5 i Ç A RAD 7 FEET 5 INCH
3. Enter polygon sides and calculate:
5 Ç l FULL 108.00°
l HALF 54.00°
l SIDE 8 FEET 8-5/8 INCH
l PER 43 FEET 7-1/8 INCH
l AREA 130.7868 SQ FEET
STORED
POCKET REFERENCE GUIDE — 32
CONCRETE FOOTING
Find the number of cubic Yards of concrete
required for a (16 Inch x 8 Inch) footing that
measures 232 Feet 6 Inches in length.
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter footing Area:
8 i x 1 6 i =
T F F-AR 128. SQ INCH
3. Enter Length to find Volume:
2 3 2 f 6 i F
FTG 7.654321 CU YD
Concrete Footings —
Continuous Lengths
You are going to pour concrete for a 264
square Inch footing being used for the following continuous Lengths of footing: 15
Feet, 18 Feet, 24 Feet and 33 Feet. What
is the total Volume of concrete you’ll
need?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter footing Area:
2 6 4 i i T F
F-AR 264. SQ INCH
3. Add Lengths:
1 5 + 1 8 + 2 4 + 3 3
= f 90. FEET
4. Find total Volume:
F FTG 6.111111 CU YD
STORED
STORED
POCKET REFERENCE GUIDE — 33
FINDING WEIGHT PER VOLUME
Find the total Volume and Weight of a 10
Foot high by 16 Foot long by 8 Inch thick
concrete tilt–up wall. The unit Weight is
1.5 Tons per cubic Yard of concrete.
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Store unit Weight:
1 • 5 T0 1.5 Ton Per CU YD
3. Enter Height, Length and thickness:
1 6 f l LNTH 16 FEET 0 INCH
8 i W WDTH 8 INCH
1 0 f h HGHT 10 FEET 0 INCH
4. Solve for Volume:
h VOL 3.950617 CU YD
5. Find Weight in Tons:
Ç 6 5.925926 Ton
CONCRETE BAGS
How many 80 lb. bags of concrete would it
take for a 4’ x 8’ slab 4” deep? Use default
of 0.666667 cubic Feet per bag.
KEYSTROKE DISPLAY
1. Multiply Length times Width times Depth:
o o 0.
4 f x 8 f x 4 i
= 0.395062 CU YD
2. Find number of bags:
Ç 5 BAGS 16.
Note: To change your bag size, enter the new volume
per bag and press
T 5
(e.g.;
• 5 f f f
T 5
). Bag size remains stored until a new bag size
is stored in its place, or a Clear All (
Ç x
) or reset is
performed.
STORED
POCKET REFERENCE GUIDE — 34
CALCULATING DROP
Drop of Sloped Patio
You’re pouring a sloped concrete patio
with a Length of 14 Feet. If the standard
drop or fall is 1/8 Inch per Foot, what is
the total drop or fall? What if the drop is
1/4 Inch per Foot or .375 Inch per Foot?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter total Length of wall:
1 4 f l LNTH 14 FEET 0 INCH
3. Enter 1/8 Inch drop per Foot and find
amount of drop:
1 / 8 d d
DROP 0 FEET 1-3/4 INCH
4. Enter 1/4 Inch drop per Foot and find
amount of drop:
1 / 4 d d
DROP 0 FEET 3-1/2 INCH
5. Enter .375 Inch drop per Foot and find
amount of drop:
• 3 7 5 i d d
DROP 0 FEET 5-1/4 INCH
6. Convert to decimal Inches:
Ç i 5.25 INCH
7. Convert to decimal Feet:
Ç f 0.4375 FEET
POCKET REFERENCE GUIDE — 35
Drop of Retaining Wall
You’re building a 61 Foot 8 Inch retaining
wall along a driveway that slopes away at
1/4 Inch per Foot. There are 4 sections,
each measuring 15 Feet 5 Inches in
Length. What is the proper drop amount
for each section? What is the total (accumulated) drop Depth at the end of all four
sections?
KEYSTROKE DISPLAY
1. Clear calculator:
o o 0.
2. Enter wall section Length:
1 5 f 5 i l
LNTH 15 FEET 5 INCH
3. Enter drop per Foot to find the drop per
section and the total drop Depth at 1st
wall section:
1 / 4 d d
DROP 0 FEET 3-7/8 INCH
4. Find total drop Depth of 2nd through 4th
wall sections:
d DROP 0 FEET 7-11/16 INCH
d DROP 0 FEET 11-9/16 INCH
d DROP 1 FEET 3-7/16 INCH
Note: Successive presses of dwill continue to
add the drop amount of 3-7/8 Inches to the prior wall
section’s drop, for an accumulated drop total.
POCKET REFERENCE GUIDE — 36
STAIR CALCULATIONS
The
ConcreteCalc Pro
can calculate the
values used in stair building, given entered
values for floor-to-floor rise ( h ) or run of
treads ( l ), based on desired riser
Height and tread Width.
POCKET REFERENCE GUIDE — 37
Stairs —
Given Rise and Run
You’re going to build a stairway that has a
floor-to-floor Height of 10 Feet 1 Inch, a
run of 12 Feet 5 Inches, and a desired
riser Height of 7-1/2 Inches (default). Find
the stair values:
KEYSTROKE DISPLAY
1. Enter rise and run:
o o 0.
1 0 f 1 i h
HGHT 10 FEET 1 INCH
1 2 f 5 i l
LNTH 12 FEET 5 INCH
2. Recall stored 7-1/2” desired riser Height,
then find the stair values:
® 7 R-HT 7-1/2 INCH
s R-HT 7-9/16 INCH*
s RSRS 16.
s R+/– 0 INCH
s T-WD 9-15/16 INCH*
s TRDS 15.
s T+/– 0-1/16 INCH
s OPEN 9 FEET 10-1/4 INCH
s STRG 15 FEET 7-5/16 INCH
s INCL 37.27°
* in the display means that the calculated riser
Height exceeds the desired (stored) riser Height, or
the calculated tread Width is below the desired
(stored) tread Width.
STORED
POCKET REFERENCE GUIDE — 38
Stairs —
Given Rise Only
You’re building a stairway with a total rise
of 9 Feet 11 Inches. Using the default riser
Height of 7-1/2 Inches and tread Width of
10 Inches, find the stair values:
KEYSTROKE DISPLAY
1. Enter known rise:
o o 0.
9 f 1 1 i h
HGHT 9 FEET 11 INCH
2. Recall stored desired stair riser Height:
® 7 R-HT 7-1/2 INCH
3. Recall stored desired stair tread Width:
® 9 T-WD 10 INCH
4. Find stair values:
s R-HT 7-7/16 INCH
s RSRS 16.
s R+/– 0 INCH
s T-WD 10 INCH
s TRDS 15.
s T+/– 0 INCH
s OPEN 10 FEET 1 INCH
s STRG 15 FEET 6-15/16 INCH
s INCL 36.64°
To calculate stairs given run (Length) only: If
you have a value stored in Height, it will
be used in the stair calculation. You will
need to clear the value by entering zero
into Height (e.g.
0 h
).
STORED
STORED
STORED
POCKET REFERENCE GUIDE — 39
Stairs —
Riser Limited Function
Calculate stairs using the Riser Limited
function, if you must limit the riser Height
to 7-1/2 Inches:
KEYSTROKE DISPLAY
1. Enter rise and run:
o o 0.
1 0 f 1 i h
HGHT 10 FEET 1 INCH
1 2 f 5 i l
LNTH 12 FEET 5 INCH
2. Recall stored 7-1/2” desired riser Height
and find stair values:
® 7 R-HT 7-1/2 INCH
Ç s R-HT 7-1/8 INCH
s RSRS 17.
s R+/– 0-1/8 INCH
s T-WD 9-5/16 INCH*
s TRDS 16.
s T+/– 0 INCH
s OPEN 9 FEET 9-5/8 INCH
s STRG 15 FEET 7-5/8 INCH
s INCL 37.42°
* in the display means that the calculated riser
Height exceeds the desired (stored) riser Height, or
the calculated tread Width is below the desired
(stored) tread Width.
STORED
POCKET REFERENCE GUIDE — 40
ACCURACY/ERRORS
Accuracy/Display Capacity –
Your calculator has a twelve digit display. This is
made up of eight digits (normal display)
and four fractional digits. You may enter or
calculate values up to 19,999,999.99.
Each calculation is carried out internally to
twelve digits.
Errors – When an incorrect entry is made,
or the answer is beyond the range of the
calculator, it will display the word
“
ERROR.” To clear an error condition you
must press the
o button once. At this
point you must determine what caused the
error and re-key the problem.
Error Codes
DISPLAY ERROR TYPE
OFLO Overflow (too large)
MATH Error Divide by 0
DIM Error Dimension error
ENT Error Invalid entry error
None Attempts to calculate stairs
without entering rise and run
Auto-Range – If an “overflow” is created
because of a calculation with small units
that are out of the standard digit range of
the display, the answer will be automatically expressed in the next larger units
(instead of showing “
ERROR”) –
APPENDIX
(Cont’d)
POCKET REFERENCE GUIDE — 41
e.g., 20,000,000 mm is shown as 20,000 m.
Also applies to Inches, Feet and Yards.
Note: If Exponential Notation is activated through
the Preference Setting, the value will be shown
in scientific notation (e.g., 20 million mm –
2.00000
07
mm).
BATTERY AND AUTO SHUT-OFF
Your calculator is powered by a single 3Volt Lithium CR-2016 battery. This should
last approximately 800 hours of actual use
(1 year plus for most people). Should the
display become very dim or erratic, replace
the battery.
WARNING: Please use caution when disposing of your old batteries
as they contain hazardous chemicals.
Your calculator is designed to shut itself off
after about 8-12 minutes of non-use.
Note: Values in memory or shown on the display
will be cleared.
Replacing the Battery
Turn the calculator over and open user
guide door located at the top. Pull battery
holder out (top left corner) and turn over.
Remove old battery and slide new battery
under tabs. Turn holder over (negative side
facing you) and insert into calculator.
(Cont’d)
POCKET REFERENCE GUIDE — 42
DEFAULT SETTINGS
After a
Clear All
(Ç x), your calculator
will return to the following settings:
STORED VALUES DEFAULT VALUE
Desired Riser Height 7-1/2 INCH
Desired Tread Width 10 INCH
Floor Height 10 INCH
Rebar Spacing 18 INCH
Rebar Inset 3 INCH
Rebar Size #5 (5/8”)
Load Size 8 CU YD
Bag Size 0.666667 CU FEET
Weight per Volume 1.5 Ton Per CU YD
Block Area 128 SQ INCH
Block Length 16 INCH
Footing Area 264 SQ INCH
If you replace your battery or perform a
Full Reset
* (press O, hold down x, and
press
o), your calculator will return to
the following settings (in addition to those
listed above):
PREFERENCE SETTINGS DEFAULT VALUE
Fractional Resolution 1/16”
Area Display Standard
Volume Display Standard
Stairway Headroom 6 FEET 8 INCH
Exponent Off
Meter Linear Display 0.000
Decimal Degree Display 0.00°
Fractional Mode Standard
*Depressing the Reset button located above the
l
key will also perform a Full Reset.
POCKET REFERENCE GUIDE — 43
AREA FORMULAS
POCKET REFERENCE GUIDE — 44
SURFACE AREAAND VOLUME
FORMULAS
POCKET REFERENCE GUIDE — 45
WARRANTY, REPAIR AND RETURN
INFORMATION
Return Guidelines
1.
Please read the
Warranty
in this
User's Guide to determine if your
Calculated Industries product remains
under warranty before calling or
returning any device for evaluation or
repairs.
2. If your product won't turn on, check
the battery as outlined in the User's
Guide.
3. If you need more assistance, please
go to the website listed below.
4. If you believe you need to return your
product, please call a Calculated
Industries representative between the
hours of 8:00am to 4:00pm Pacific
Time for additional information and a
Return Merchandise Authorization
(RMA).
Call Toll Free: 1-800-854-8075
Outside USA: 1-775-885-4900
www.calculated.com/warranty
REPAIR AND RETURN
POCKET REFERENCE GUIDE — 46
Warranty Repair Service –
U.S.A.
Calculated Industries (“CI”) warrants this product against
defects in materials and workmanship for a period of one
(1) year from the date of original consumer purchase in
the U.S. If a defect exists during the warranty period, CI
at its option will either repair (using new or remanufactured parts) or replace (with a new or remanufactured
calculator) the product at no charge.
THE WARRANTY WILL NOT APPLY TO THE PRODUCT
IF IT HAS BEEN DAMAGED BY MISUSE, ALTERATION,
ACCIDENT, IMPROPER HANDLING OR OPERATION,
OR IF UNAUTHORIZED REPAIRS ARE ATTEMPTED
OR MADE. SOME EXAMPLES OF DAMAGES NOT
COVERED BY WARRANTY INCLUDE, BUT ARE NOT
LIMITED TO, BATTERY LEAKAGE, BENDING, A BLACK
“INK SPOT” OR VISIBLE CRACKING OF THE LCD,
WHICH ARE PRESUMED TO BE DAMAGES RESULTING FROM MISUSE OR ABUSE.
To obtain warranty service in the U.S., please go to the
website.
A repaired or replacement product assumes the remaining warranty of the original product or 90 days, whichever
is longer.
Non-Warranty Repair Service –
U.S.A.
Non-warranty repair covers service beyond the warranty
period, or service requested due to damage resulting
from misuse or abuse.
Contact Calculated Industries at the number listed on the
last page of this guide to obtain current product repair
information and charges. Repairs are guaranteed for 90
days.
WARRANTY
POCKET REFERENCE GUIDE — 47
Repair Service –
Outside the U.S.A.
To obtain warranty or non-warranty repair service for
goods purchased outside the U.S., contact the dealer
through which you initially purchased the product. If you
cannot reasonably have the product repaired in your
area, you may contact CI to obtain current product repair
information and charges, including freight and duties.
Disclaimer
CI MAKES NO WARRANTY OR REPRESENTATION,
EITHER EXPRESS OR IMPLIED, WITH RESPECT TO
THE PRODUCT’S QUALITY, PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR
PURPOSE. AS ARESULT, THIS PRODUCT, INCLUDING BUT NOT LIMITED TO, KEYSTROKE PROCEDURES, MATHEMATICALACCURACY AND PREPROGRAMMED MATERIAL, IS SOLD “AS IS,” AND YOU
THE PURCHASER ASSUME THE ENTIRE RISK AS TO
ITS QUALITY AND PERFORMANCE.
IN NO EVENT WILL CI BE LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES RESULTING FROM ANY DEFECT IN THE
PRODUCT OR ITS DOCUMENTATION.
The warranty, disclaimer, and remedies set forth above
are exclusive and replace all others, oral or written,
expressed or implied. No CI dealer, agent, or employee
is authorized to make any modification, extension, or
addition to this warranty.
Some states do not allow the exclusion or limitation of
implied warranties or liability for incidental or consequential damages, so the above limitation or exclusion may
not apply to you. This warranty gives you specific rights,
and you may also have other rights, which vary from
state to state.
POCKET REFERENCE GUIDE — 48
FCC Class B
This equipment has been certified to comply with the limits for a Class B computing device, pursuant to Subpart J
of Part 15 of FCC rules.
Looking For New Ideas
Calculated Industries, a leading manufacturer of specialfunction calculators and digital measuring instruments, is
always looking for new product ideas in these areas.
If you have an idea, or a suggestion for improving this
product or User's Guide, please submit your comments
online at www.calculated.com under “Contact Us”,
“Product Idea Submittal Agreement”. Thank you.
This equipment has been certified to comply
with the limits for a Class B computing device,
pursuant to Subpart J of Part 15 of FCC rules.
Software copyrighted and licensed to
Calculated Industries, Inc. by
Construction Master Technologies, LLC, 2005.
Pocket Reference Guide copyrighted by
Calculated Industries, Inc. © 2005.
ConcreteCalc™ is a trademark, and
Construction Master® and Calculated Industries® are
registered trademarks of Calculated Industries, Inc.
ALL RIGHTS RESERVED
CALCULATED INDUSTRIES®
4840 Hytech Drive
Carson City, NV 89706 U.S.A.
1-800-854-8075 Fax: 1-775-885-4949
E-mail: info@calculated.com
www.calculated.com
Designed in the USA
Printed in China
PRG4225E-B
7/05
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