Tables & Formulas for Carpentry

Formula's & Table's
for everyday Carpentry

CIRCLE'S

		DIAMETER = C x .31831 Circumference X .31831
		CIRCUMFERENCE = Pi x d Diameter X Pi ( Pi = 301416 )
		AREA OF A CIRCLE = Pi x r ² Radius squared ( radius X radius ) X Pi
		VOLUME OF A CYLINDER = Pi x r ² x h Pi X radius squared ( radius X radius ) X height

TRIANGLE

To find the Hypotenuse of a triangle you use the
Pythagorean Theory which is a ² + b ² = c ²

( a x a ) + ( b x b ) = ( c x c )

a = Height b= Base c = Hypotenuse

The Pythagorean Theory can be used in odd triangle
such as the one to the left. Just make 90 ^o angle from base to the intersecting lines at top of triangle and use the a ² + b ² = c ²

^{This can be changed around
to find a missing side measurement when the other 2 sides are known}

^{AREA
OF A TRIANGLE =

1/2b x h}

^{1/2
Base x Height}

AREA'S

		AREA OF A SQUARE = S x S Side x Side
		AREA OF A RECTANGLE = Length x Width
		AREA OF A PARELLELOGRAM = Base x Height
		AREA OF A TRAPEZOID = 1/2 x ( base 1 + base 2 _) x Height
		VOLUME OF A CUBE = Length x Width x Height ( width or depth ) CUBIC MEASURE 1. 27 cubic feet equals = 1 cubic yard 2. 1728 cucic inches equals = 1 cubic yard

MISCELLANEOUS ITEMS

Double the diameter of a pipe   =   and you quadruple the capacity

Water = 1 Gallon = 8-1/2 pounds   or 231 cubic inches

Water = 7-1/2 gallons equal 62-1/2 pounds or 1 cu. ft.

1 cubic foot of sand            =   100 pounds

1 cubic yard of sand           =   2700 pounds

1 ton = 3/4               =   20 cubic feet

1 shovel of               =   15 pounds

The proper formula for Concrete is
1 part cement - 2 parts sand - 3 parts gravel

The proper formula for Mortar is
1 part mortar cement - 2 or 3 parts sand

Hundredths of a Foot

Inches	Decimal	-	Inches	Decimal
1	.08	-	7	.58
2	.17	-	8	.67
3	.25	-	9	.75
4	.33	-	10	.83
5	.42	-	11	.92
6	.50	-	12	1.00

English to Metric	Metric to English
=
Inches x 25.4 = Millimeters	Millimeters x .03937 = Inches
=
Feet x 25.4 = Meters	Meters x 3.2809 = Feet
=
Miles x 1.6093 = Kilometers	Kilometers x .62138 = Miles
=
Square inches x 6.4515 = square centimeters	Square centimeters x .155 = inches
=
Square Feet x 09290 = square meters	Square meters x 10.7641 = square feet
=
Cubic inches x 16.3872 = cubic centimeters	Cubic centimeters x .0613 = cubic inches
=
Cubic feet x. .02832 = cubic meters	Cubic meters x 35.314 = cubic feet
=
Cubic yards x .76452 = cubic meters	Cubic meters x 1.308 = cubic yards
=
Ounces x 28.35 grams	Grams x .03527 = ounces
=
Pounds x .4536 = kilograms	Kilograms x 2.2046 = pounds
=
Ton x .9072 = metric ton	Metric tons x 1.1023 = ton ( 2,000 lbs )
=
Horsepower x .746 = kilowatts	Kilowatts x 1.3405 = horsepower
=

Fraction	Decimal	Millimeters		Fraction	Decimal	Millimeters
1/64	.0156	0.3969	-	33/64	.5156+	13.0969
1/32	.0312	0.7938	-	17/32	.5312	13.4938
3/64	.0469	1.1906	-	35/64	.5469	13.8906
1/16	.0625	1.5875	-	9/16	.5625	14.2875
5/64	.0781	1.9844	-	37/64	.5781	14.6844
3/32	.0938	2.3812	-	19/32	.5938	15.0812
7/64	.1094	2.7781	-	39/64	.6094	15.4781
1/8	.1250	3.1750	-	5/8	.6250	15.8750
9/64	.1406	3.5719	-	41/64	.6406	16.2719
5/32	.1562	3.9688	-	21/32	.6562	16.6688
11/64	.1719	4.3656	-	43/64	.6719	17.0656
3/16	.1875	4.7625	-	11/16	.6875	17.4625
13/64	.2031	5.1594	-	45/64	.7031	17.8594
7/32	.2188	5.5562	-	23/32	.7188	18.2562
15/64	.2344	5.9531	-	47/64	.7344	18.6531
1/4	.2500	6.3500	-	3/4	.7500	19.0500
17/64	.2656	6.7469	-	49/64	.7656	19.4469
9/32	.2812	7.1438	-	25/32	.7812	19.8438
19/64	.2969	7.5406	-	51/64	.7969	20.2406
5/16	.3125	7.9375	-	13/16	.8125	20.6375
21/64	.3281	8.3344	-	53/64	.8281	21.0344
11/32	.3438	8.7312	-	27/32	.8438	21.4312
23/64	.3594	9.1281	-	55/64	.8594	21.8281
3/8	.3750	9.5250	-	7/8	.8750	22.2250
25/64	.3906	9.2919	-	57/64	.8906	22.6219
13/32	.4062	10.3188	-	29/32	.9062	23.0188
27/64	.4219	10.7156	-	59/64	.9219	23.4156
7/16	.4375	11.1125	-	15/16	.9375	23.8125
29/64	.4531	11.5094	-	61/64	.9531	24.2094
15/32	.4688	11.9062	-	31/32	.9688	24.6062
31/64	.4844	12.3031	-	63/64	.9844	24.0031
1/2	.5000	12.70000	-	1	1.0000	25.4000