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Conversion Factors

Force

1 lbf/ft = 0.138kgf/m = 1.356 lbf/ft = 12 lbf/in
1 kgf/m = 7.233 lbf/ft = 9.807 Nm = 86.8 lbf/in
1 Nm = 0.102 kgf/m = 0.7376 Nm = 8.85 lbf/in = 1 joule
1 lbf/in = 0.113 Nm = 0.0115 kgf/m = 0.083 lbf/ft

 

Liquids

1 Imp. gallon (capacity) = 4.456 litres = 1.201 US gallons = 153.73fl.ozs
1 US gallon (capacity) = 3.785 litres = 0.833 Imp. gallons = 128 fl. ozs
1 Imp. gallon (volume) = 277.4 cu.in = 0.16 cu.ft = 4546cc
1 Imp. gallon (weight) Petrol = 6lbs Refined oil = 6.6lbs Fresh water = 8.354lbs

 

Weights

1 ounce = 28.35 grms = 0.278 newtons
1 lb = 16 ozs. = 0.4536 kg. = 4.448 newtons
1 gram = 0.0353 ozs. = 0.0098 newtons
1 ton = 1.016 tonnes = 1016 kg = 2240 lbs
1 tonne = 0.984 ton = 1000 kg = 2204.6 lbs

 

Pressures

1 bar = 14.504 lbs/sq.in = 100,000 pascals = 29.53 in. of mercury
1 lb/sq.in. = 0.0689 bar = 6.895 kilopascals = 2.036 in. of mercury
1 kg/sq.cm = 14.223 lbs/sq.in. = 0.981 bar = 98.066 kilopascals

 

Power/Energy

1 BHP (SAE) = *1.01387 BHP (PS) = 0.7457 KW = 33,000 lbs/ft/min.
1 KW/Hour = 3412 Btu/hrs. = 1.341 BHP/hrs. = 3600 Kilojoules
* For all practical purposes SAE and PS (Metric) horsepower are the same

 

Acceleration/Velocity

1 mph = 1.6093 kph = 44.7 cm/sec. = 88 ft/min. = 1.4667 ft/sec.
1 kph = 0.6214 mph = 27.778 cm/sec. = 54.68 ft/min. = 0.9113 ft/sec.

 

Distance

1 inch = 25.4mm = 2.54 cm = 25400 microns
1 foot = 304.8mm = 30.48 cm = 12 in
1 mile = 1.609 km = 1760 yds = 5280 ft.
1 mm = 0.03937 in. = 1000 microns
1 cm = 0.0328 ft = 10,000 microns
1 metre = 3.2808 ft = 39.37 in. = 1.0936 yds.
1 km = 0.6214 miles = 1,093.61 yds = 3,280.84 ft