Conversion Factors

Below are instructions for converting factors, including changing acres to hectares, Btu/hour to horsepower, centimeters to inches, degrees to radians, feet to miles, furlongs to feet, liters to gallons, and more. See also the Infoplease.com conversion calculator

To change	To	Multiply by
acres	hectares	.4047
acres	square feet	43,560
acres	square miles	.001562
atmospheres	cms. of mercury	76
Btu/hour	horsepower	.0003930
Btu	kilowatt-hour	.0002931
Btu/hour	watts	.2931
bushels	cubic inches	2150.4
bushels (U.S.)	hectoliters	.3524
centimeters	inches	.3937
centimeters	feet	.03281
cubic feet	cubic meters	.0283
cubic meters	cubic feet	35.3145
cubic meters	cubic yards	1.3079
cubic yards	cubic meters	.7646
degrees	radians	.01745
dynes	grams	.00102
fathoms	feet	6.0
feet	meters	.3048
feet	miles (nautical)	.0001645
feet	miles (statute)	.0001894
feet/second	miles/hour	.6818
furlongs	feet	660.0
furlongs	miles	.125
gallons (U.S.)	liters	3.7853
grains	grams	.0648
grams	grains	15.4324
grams	ounces (avdp)	.0353
grams	pounds	.002205
hectares	acres	2.4710
hectoliters	bushels (U.S.)	2.8378
horsepower	watts	745.7
horsepower	Btu/hour	2,547
hours	days	.04167
inches	millimeters	25.4000
inches	centimeters	2.5400
kilograms	pounds (avdp or troy)	2.2046
kilometers	miles	.6214
kilowatt-hour	Btu	3412
knots	nautical miles/hour	1.0
knots	statute miles/hour	1.151
liters	gallons (U.S.)	.2642
liters	pecks	.1135
liters	pints (dry)	1.8162
liters	pints (liquid)	2.1134
liters	quarts (dry)	.9081
liters	quarts (liquid)	1.0567
meters	feet	3.2808
meters	miles	.0006214
meters	yards	1.0936
metric tons	tons (long)	.9842
metric tons	tons (short)	1.1023
miles	kilometers	1.6093
miles	feet	5280
miles (nautical)	miles (statute)	1.1516
miles (statute)	miles (nautical)	.8684
miles/hour	feet/minute	88
millimeters	inches	.0394
ounces (avdp)	grams	28.3495
ounces	pounds	.0625
ounces (troy)	ounces (avdp)	1.09714
pecks	liters	8.8096
pints (dry)	liters	.5506
pints (liquid)	liters	.4732
pounds (ap or troy)	kilograms	.3732
pounds (avdp)	kilograms	.4536
pounds	ounces	16
quarts (dry)	liters	1.1012
quarts (liquid)	liters	.9463
radians	degrees	57.30
rods	meters	5.029
rods	feet	16.5
square feet	square meters	.0929
square kilometers	square miles	.3861
square meters	square feet	10.7639
square meters	square yards	1.1960
square miles	square kilometers	2.5900
square yards	square meters	.8361
tons (long)	metric tons	1.016
tons (short)	metric tons	.9072
tons (long)	pounds	2240
tons (short)	pounds	2000
watts	Btu/hour	3.4121
watts	horsepower	.001341
yards	meters	.9144
yards	miles	.0005682