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Quantity English Metric
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Length 1 mile = 1.609347 km
1 yard = 0.9144 m
1 foot = 0.3048 m
1 inch = 25.40 mm
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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
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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
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Mass 1 lb = 0.4536 kg
1 stone = 6.3504 kg
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Mass/unit length 1 plf = 1.488 kg/m
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Mass/unit area 1 psf = 4.882 kg/m2
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Mass density 1 pcf = 16.02 kg/m3
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Force 1 lb = 4.448 N
1 kip = 4.448 kN
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Force/unit length 1 plf = 14.59 N/m
1 klf = 14.59 kN/m
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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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