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.
