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36
Table 32.
English Conversion Factors & Data
Table 33.
English to Metric Conversion Factors
To Convert Measurements
From To Multiply By
Cubic Feet Cubic Inches 1728
Cubic Inches Cubic Feet 0.00058
Cubic Feet Gallons 7.48
Gallons Cubic Feet 0.1337
Cubic Inches Gallons 0.00433
Gallons Cubic Inches 231
Barrels Gallons 42
Gallons Barrels 0.0238
Imperial Gallons U.S. Gallons 1.2009
U.S. Gallons Imperial Gallons 0.8326
Feet Inches 12
Inches Feet 0.0833
Square Feet Square Inches 144
Square Inches Square Feet 0.00695
Short Tons Pounds 2000
Liters U.S. Gallons 0.2642
To Convert Pressure (at 32ºF.)
From To Multiply By
Inches of Water Pounds per Sq. Inch 0.03612
Pounds per Sq. Inch Inches of Water 27.866
Feet of Water Pounds of Sq. Inch 0.4334
Pounds per Sq. Inch Feet of Water 2.307
Inches of Mercury Pounds per Sq. Inch 0.4912
Pounds per Sq. Inch Inches of Mercury 2.036
Atmospheres Pounds per Sq. Inch 14.696
Pounds per Sq. Inch Atmosphere 0.06804
To Convert Power
From To Multiply By
Horsepower Metric Horsepower 1.014
Horsepower Ft./Pounds per Min. 33000
Horsepower Kilowatts 0.746
Kilowatts Horsepower 1.3404
British Thermal Units Foot/Pounds 778.177
Foot/Pounds British Thermal Units 0.001285
British Thermal Units Horsepower Hours 0.0003927
Horsepower Hours British Thermal Units 2544.1
British Thermal Units Kilowatt Hours 0.0002928
Kilowatt British Thermal Units 3415
Watt Hour British Thermal Units 3.415
Volume – Weight Conversions Wt. lbs.
1 Cubic Foot of Water 62.4*
1 Cubic Inch of Water 0.0361*
1 Gallon of Water 8.33*
1 Cubic Foot of Air 0.075†
1 Cubic inch of Steel 0.284
1 Cubic Foot of Brick (Building) 112-120
1 Cubic Foot of Concrete 120-140
1 Cubic Foot of Earth 70-120
* at 32ºF.
† at 70ºF. and 29.92” Hg.
To Convert Measurements
From To Multiply By
Cubic Feet Cubic Centimeters 28317
Cubic Inches Cubic Centimeters 16.387
Cubic Feet Liters 28.32
Gallons Liters 3.7854
Cubic Inches Liters 0.0164
Gallons Cubic Centimeters 3785.4
Barrels Cubic Meters 1.0551
Imperial Gallons Cubic Meters 0.0045461
U.S. Gallons Cubic Meters 0.0037854
Feet Meters 0.3048
Inches Meters 0.0254
Square Feet Square Meters 0.0929
Square Inches Square Centimeters 6.452
Ton (Short, 2000lb.) Kilograms 907.2
Liter Cubic Meter 0.0001
Pounds Kilograms 0.45359
To Convert Pressure (at 32ºF.)
From To Multiply By
Inches of Water Newton/Sq. Meter 249.082
Pounds per Sq. Inch Newton/Sq. Meter 6894.8
Feet of Water Newton/Sq. Meter 2988.98
Pounds per Sq. Inch Kilograms/Sq. Cent. 0.07031
Inches of Mercury Newton/Sq. Meter 3386.4
Pounds per Sq. Inch Dyne/Sq. Cent. 68948
Atmospheres Newton/Sq. Meter 101325
Pascal Newton/Sq. Meter 1
To Convert Power
From To Multiply By
Horsepower Watt 745.7
British Thermal Units Joule 1054.35
Foot – Pounds Joule 1.3558
British Thermal Units Calorie 252.0
British Thermal Units Watt Second 1054.35
Watt – Second Joule 1
Calorie Joule 4.184
Watt Hours Joule 3600
Kilocalorie/Minute Watt 69.73
Ton (Refrigerated) Watt 3516.8
BTU/Hour Watt 0.29288
BTU/In/Hr. Ft.
2
ºF. Watt/Meter ºK. 0.14413
BTU/Hr. at 10ºF. T.D. Kcal/Hr. at 6ºC. T.D. 0.252
BTU/Hr. at 15ºF. T.D. Kcal/Hr. at 8ºC. T.D. 0.252
Volume – Weight Conversions Wt. Kilograms
1 Cubic Foot of Water 28.3*
1 Cubic Inch of Water 0.0164*
1 Gallon of Water 3.788*
1 Cubic Foot of Air 0.034†
1 Cubic inch of Steel 0.1288
1 Cubic Foot of Brick (Building) 51-54
1 Cubic Foot of Concrete 54-64
1 Cubic Foot of Earth 32-54
* at 32ºF.
† at 70ºF. and 29.92” Hg.