--------------------------------------------------------- Quantity English Metric --------------------------------------------------------- Length 1 mile = 1.609347 km 1 yard = 0.9144 m 1 foot = 0.3048 m 1 inch = 25.40 mm --------------------------------------------------------- Area 1 square mile = 2.590 km2 1 acre = 4047 m2 1 acre = 0.4047 ha 1 square yard = 0.8361 m2 1 square foot = 0.09290 m2 1 square inch = 645.2 mm2 --------------------------------------------------------- Volume 1 acre foot = 1233 m3 1 cubic yard = 0.7646 m3 1 cubic foot = 0.02832 m3 1 cubic foot = 28.32 l 100 board feet = 0.2360 m3 1 gallon = 3.785 l --------------------------------------------------------- Mass 1 lb = 0.4536 kg 1 stone = 6.3504 kg --------------------------------------------------------- Mass/unit length 1 plf = 1.488 kg/m --------------------------------------------------------- Mass/unit area 1 psf = 4.882 kg/m2 --------------------------------------------------------- Mass density 1 pcf = 16.02 kg/m3 --------------------------------------------------------- Force 1 lb = 4.448 N 1 kip = 4.448 kN --------------------------------------------------------- Force/unit length 1 plf = 14.59 N/m 1 klf = 14.59 kN/m --------------------------------------------------------- Pressure etc. 1 psf = 47.88 Pa 1 ksf = 47.88 kPa 1 psi = 6.895 kPa 1 ksi = 6.895 MPa ---------------------------------------------------------
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