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 0.5 quarts, dry pint, liquid (US) 0.473 176 473 liters 0.5 quarts, dry pennyweight 1.555 173 84 grams 24 grains pint, dry (US) 1.101 221 liters 2 pints, liquid kilogram 0.001 tons, metric 2.204 623 pounds, avdp kilometer 1,000 meters 0.621 371 19 miles, statute link (surveyor's) 20.116 8 meters 0.333 333 tablespoons ton, long or deadweight 1,016.046 909 kilograms 2,240 pounds, avdp. ton, metric 1,000 kilograms 2,204.623 pounds, avdp. rod 5.029 2 meters 5.5 yards scruple 1.295 978 2 grams 0.0625 5 ounces, avdp dram, troy 3.887 934 6 grams
Vader