10-^4 10-^6 milli m 10-^3 10-^6 10-^9 decimilli dm 10-^4 10-^8 10-^12 centimilli cm 10-^5 10-^10 10^15 micro u 10-^6 10-^12 10-^18 nano n 10-^9 10-^18 10-^27 pico p 10-^12 10-^24 10-^36 femto f 10-^15 10-^30 10-^45 atto a 10-^18 10-^36 10-^54 Equivalents Units Metric Equivalent US Equivalent acre 0.404 685 64 hectares 43,560 feet^2 acre 4,046,856 4 meters^2 4,840 yards^ 2 acre 0.004 046 856 4 kilometers^2 0.001 562 miles^2,statute are 100 meters^2 119.599 yards^2 barrel (petroleum, US) 158.987 29 liters 42 gallons (proof spirits, US) 151.416 47 liters 40 gallons (beer, US) 117.347 77 liters 31 gallons bushel 35.239 07 liters 4 quarts, liquid point (typographical) 0.351 459 8 millimeters 0.013 837 inches pound, avdp 453.592 37 grams 16 ounces, avdp pound, troy 373.241 721 6 grams 12 ounces, troy ton, register 2.831 684 7 meters^3 100 feet^3 ton, short 907.184 74 kilograms 2,000 pounds, avdp. ton, metric 1,000 kilograms 32,150.75 ounces, troy quart, dry (US) 0.550 610 47 liters 40 gallons (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 centimeters 7.92 inches liter
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