Metric Conversion

Units Conversion From Imperial/US customary units to SI/Metric units

fps unit

SI unit
Length

1 inch (in)

2.54 x 10-2 m

1 foot (ft)

0.3048 m

1 yard (yd)

0.9144 m
1 fathom 1.8288 m
1 chain 20.1168 m
1 furlong 2.01168m x 102 m
1 mile (mi) 1.609344 x 103 m
Area
1 square inch (in2) 6.45 x 10-4 m2
1 square feet (ft2) 9.29 x 10-2 m2
1 square yard (yd2) 0.836 m2
1 square mile (mi2) 2.5899 x 106 m2
1 acre 4.0468 x 103 m2
Mass
1 ounce (oz) 2.83 x 10-2 kg
1 pound (lb) 0.45 kg
1 stone 6.35 kg
1 quarter 12.7 kg
1 hundred weight (cwt) 50.8 kg
1 ton 1.016 x 103 kg
Volume
1 cubic inch (in3) 1.69 x 10-5 m3
1 cubic feet (ft3) 2.83 x 10-2 m3
1 cubic yard (yd3) 0.764 m3
1 fluid ounce (fl oz) 2.84 x 10-5 m3
1 pint (pt) 5.68 x 10-4 m3
1 quart (qt) 1.136 x 10-3 m3
1 gallon (gal) 4.546 x 10-3 m3
1 bushel (bu) 0.036 m3
1 gallon USA (=231 in3) 3.78 x 10-3 m3
Note: 1cm3 = 1 ml and 1m3 =1000 Litre
Speed
1 inch per second (in s-1) 2.54 x 10-2 m s-1
1 feet per second (ft s-1) 0.305 m s-1
1 mile per hour (mi h-1) 0.447 m s-1
Force
1 poundal (pdl) 0.14 N
1 pound force (lbf)
(the weight of 1 pound(lb) mass)		 4.45 N
Pressure

1 pound force per square inch
1 lbf in-2 (p.s.i)

 6.8947 x 103Pa

Density

1 pound per cubic feet (1 lb ft -3)

 16.018 kg m -3

Energy

1 foot poundal (ft pdl)

4.21 x 10-2 J

1 foot pound force (ft lbf)

1.355 J

1 british thermal unit (Btu)

1.055 x 103 J

1 thermal (therm)

1.055 x 108 J

Power

1 horse power (hp)

7.457 x 102 W
   

standard atmosphere

14.695 lbf in-2 = 1.013 x 105 Pa

standard acceleration of gravity

 32.174 ft s-1 = 9.806 m s-2