Helpful Conversion Factors

Convert From:	Convert To:	Multiply By:
Btu per square foot per minute	Kilowatts per square foot	0.1758
Ampere-hours (absolute)	Coulombs (absolute)	3,600
Angstrom units	Inches	3.937 × 10-9
Angstrom units	Centimeters	1 × lO-8
Angstrom units	Microns	1 × 10-4
Atmospheres	Dynes per square centimeter	1.0133 × 106
Atmospheres	Feet of water at 39.1°F	33.90
Atmospheres	Grams per square centimeter	1,033.3
Atmospheres	Inches of mercury at 32°F	29.921
Atmospheres	Pounds per square foot	2,116.3
Atmospheres	Pounds per square inch	14.696
Bars	Atmospheres	0.9869
Bars	Pounds per square inch	14.504
Board feet	Cubic feet	1/12
Boiler horsepower	Btu per hour	33,480
Boiler horsepower	Kilowatts	9.803
Btu	Calories (gram)	252
Btu	Centigrade heat units (chu)	0.5556
Btu	Foot-pounds	777.9
Btu	Horsepower-hours	3.929 × 10-4
Btu	Joules	1,054.6
Btu	Liter-atmospheres	10.41
Btu	Pounds carbon to C02	6.88 × 10-5
Btu	Pounds water evaporated from and at 212°F	0.001036
Btu	Cubic foot-atmospheres	3,676
Btu	Kilowatthours	2.930 × 10-4
Btu (60°F) per degree Fahrenheit	Calories per degree centigrade	453.6
Btu per minute	Horsepower	0.02357
Btu per pound per degree Fahrenheit	Calories per gram per degree centigrade	1
Btu per square foot per second for a temperature gradient of 1°F per inch	Calories, gram (15°C), per square centimeter per second for a temperature gradient of 1°C per centimeter	1.2405
Calories, gram	Btu	3.968 × 10-3
Calories, gram	Foot-pounds	3.087
Calories, gram	Joules	4.18
Calories, gram	Liter-atmospheres	4.130 × 10-2
Calories, gram	Horsepower-hours	1.5591 × 10-6
Calories, kilogram	Kilowatthours	0.0011626
Calories, kilogram per second	Kilowatts	4.185
Candle power (spherical)	Lumens	12.556
Centimeters	Angstrom units	1 × 10-8
Centimeters	Feet	0.03281
Centimeters	Inches	0.3937
Centimeters	Microns	10,000
Centimeters	Inches	0.3937
Centimeters of mercury at 0°C	Atmospheres	0.013158
Centimeters of mercury at 0°C	Feet of water at 39.1°F	0.4460
Centimeters of mercury at 0°C	Pounds per square foot	27.845
Centimeters of mercury at 0°C	Pounds per square inch	0.19337
Centimeters per second	Feet per minute	1.9685
Cords	Cubic feet	128
Cubic centimeters	Cubic feet	3.532 × 10-5
Cubic centimeters	Gallons	2.6417 × 10-4
Cubic centimeters	Ounces (US fluid)	0.03381
Cubic centimeters	Quarts (US fluid)	0.0010567
Cubic feet	Bushels (US)	0.8036
Cubic feet	Cubic centimeters	28,317
Cubic feet	Cubic meters	0.028317
Cubic feet	Cubic yards	0.03704
Cubic feet	Gallons	7.481
Cubic feet	Liters	28.316
Cubic feet of water (60ºF)	Pounds	62.37
Cubic feet per minute	Cubic centimeters per second	472.0
Cubic feet per minute	Gallons per second	0.1247
Cubic feet per second	Gallons per minute	448.8
Cubic foot-atmospheres	Foot-pounds	2,116.3
Cubic foot-atmospheres	Liter-atmospheres	28.316
Curies	Disintegrations per minute	2.2 × 1012
Curies	Coulombs per minute	1.1 × 1012
Degrees	Radians	0.017453
Feet	Centimeters	30.48
Feet per minute	Centimeters per second	0.5080
Feet per minute	Miles per hour	0.011364
Foot-poundals	Btu	3.995 × 10-5
Foot-poundals	Joules	0.04214
Foot-poundals	Liter-atmospheres	4.159 × 10-4
Foot-pounds	Btu	0.0012856
Foot-pounds	Calories, grams	0.3239
Foot-pounds	Foot-poundals	32.174
Foot-pounds	Horsepower-hours	5.051 × 10-7
Foot-pounds	Kilowatthours	3.766 × 10-7
Foot-pounds	Liter-atmospheres	0.013381
Foot-pounds per second	Horsepower	0.0018182
Foot-pounds per second	Kilowatts	0.0013558
Joules (absolute)	Btu (mean)	9.480 × 10-4
Joules (absolute)	Calories, gram (mean)	0.239
Joules (absolute)	Cubic foot-atmospheres	0.3485
Joules (absolute)	Foot-pounds	0.7376
Joules (absolute)	Kilowatthours	2.7778 × 10-7
Joules (absolute)	Liter-atmospheres	0.009869
Kilowatthours	Btu	3,414
Kilowatthours	Foot-pounds	2.6552 × 106
Kilowatts	Horsepower	1.3410
Lamberts	Candles, per square inch	2.054
Lumens	Watts	0.001496
Microns	Angstrom units	1 × 104
Microns	Centimeters	1 × 10-4
Radians	Degrees	57.30
Revolutions per minute	Radians per second	0.10472