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Equivalents
Unit Metric Equivalent US Equivalent

acre 0.404 685 64 hectares 43,560 feet2
acre 4,046.856 4 meters2 4,840 yards2
acre 0.004 046 856 4 kilometers2  0.001 562 5 miles2, statute
are 100 meters2 119.599 yards2
barrel (petroleum, US) 158.987 29 liters 42 gallons
barrel (proof spirits, US)  151.416 47 liters 40 gallons
barrel (beer, US) 117.347 77 liters 31 gallons
bushel 35.239 07 liters 4 pecks
cable 219.456 meters 120 fathoms
chain (surveyor's) 20.116 8 meters 66 feet
cord (wood) 3.624 556 meters3 128 feet3
cup 0.236 588 2 liters 8 ounces, liquid
degrees, celsius (water boils at 100°C,
freezes at 0°C)
multiply by 1.8 and add 32
to obtain °F
degrees, fahrenheit subtract 32 and divide
by 1.8 to obtain °C
(water boils at 212°F,
freezes at 32°F)
dram, avoirdupois 1.771 845 2 grams 0.062 5 ounces, avoirdupois 
dram, troy 3.887 934 6 grams 0.125 ounces, troy
dram, liquid (US) 3.696 69 milliliters 0.125 ounces, liquid
fathom 1.828 8 meters 6 feet
foot 30.48 centimeters 12 inches
foot 0.304 8 meters 0.333 333 3 yards
foot 0.000 304 8 kilometers 0.000 189 39 miles, statute
foot2 929.030 4 centimeters2 144 inches2
foot2 0.092 903 04 meters2 0.111 111 1 yards2
foot3 28.316 846 592 liters 7.480 519 gallons
foot3 0.028 316 847 meters3 1,728 inches3
furlong 201.168 meters 220 yards
gallon, liquid (US) 3.785 411 784 liters 4 quarts, liquid
gill (US) 118.294 118 milliliters 4 ounces, liquid
grain 64.798 91 milligrams 0.002 285 71 ounces, avdp.
gram 1,000 milligrams 0.035 273 96 ounces, avdp.
hand (height of horse) 10.16 centimeters 4 inches
hectare 10,000 meters2 2.471 053 8 acres
hundredweight, long 50.802 345 kilograms 112 pounds, avoirdupois
hundredweight, short 45.359 237 kilograms 100 pounds, avoirdupois
inch 2.54 centimeters 0.083 333 33 feet
inch2 6.451 6 centimeters2 0.006 944 44 feet2
inch3 16.387 064 centimeters3 0.000 578 7 feet3
inch3 16.387 064 milliliters 0.029 761 6 pints, dry
inch3 16.387 064 milliliters 0.034 632 pints, liquid
kilogram 0.001 tons, metric 2.204 623 pounds, avdp.
kilometer 1,000 meters 0.621 371 19 miles, statute
kilometer2 100 hectares 247.105 38 acres
kilometer2 1,000,000 meters2 0.386 102 16 miles2, statute
knot (1 nautical mi/hr) 1.852 kilometers/hour 1.151 statute miles/hour
league, nautical 5.559 552 kilometers 3 miles, nautical
league, statute 4.828 032 kilometers 3 miles, statute
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