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UNIT CONVERSION
Length Imperial Metric
1 inch (in)   =2.54 cm
1 foot (ft) = 12 in = 0.30m
1 yard (yd) = 3 ft = 0.91 m
1 mile (mi) = 1760 yd = 1.61 km
1 nautical mile = 1.15 mi = 1.85 m
1 fathom = 6 ft = 1.83 m
1 cable = 200 yd = 185.3 m
Area    
1 in2   = 6.45 cm2
1 ft2 = 144 in2 = 0.09 m2
1 yd2 = 9 ft2 = 0.84 m2
1 acre = 4840 yd2 = 4046.86 m2
    = 0.4047 hectares
1 mi2 = 640 acres = 259 hectares
Volume    
1 in3   = 16.39 cm3
1 yd3 = 27 ft3 = 0.77 m3
Capacity    
1 gill = 4 fl. oz = 0.15 L
1 pint (pt) = 4 gills = 0.57 L
1 quart (qt) = 2 pt = 1.14 L
1 gallon (gal) = 8 pt = 4.55 L
1 peck (dry) = 2 gal = 9.09 L
1 bushel (dry) = 8 gal = 36.4 L
Velocity    
1 mile per hour (m.p.h.)   = 1.61 km/h
1 knot (nautical m.p.h.)   = 1.85 km/h
Weight (avoirdupois)    
1 grain (gr)   = 0.064 g
1 dram = 27.34 gr = 1.771 g
1 ounce (oz) = 437.5 gr = 28.35 g
1 pound (lb) = 16 oz = 0.45 kg
1 stone = 14 lb = 6.35 kg
1 quarter = 2 stone = 12.70 kg
1 short ton = 2000lb = 0.91 tonnes
1 long ton =2240lb = 1.02 tonnes
 
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