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.
| 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 |
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