1 inch = 25.4mm
1 Sq.ft. = 0.0929sq.m
1 US gal = 3.785 litres
1 foot = 0.305m
1 knot = 1.69ft/s
1 pound force = 4.448Newtons
1 HP = 745.7Watts
1 Cubic ft. = 28.32litres
1 litre = 0.001 cubic metres
1 nautical mile = 1.852km
1 knot = 0.516m/s =1.151mph
1 Pound mass = 0.454kilogram
1 HP = 550ft lb/s
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