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Conversion Formulae

Hydraulic Pump Formulae

 Actual Pump Delivery (lpm) = Volumetric Efficiency (max of 100%) x Displ.per Rev. (lpm) x Pump Speed (RPM) Pump Input Power (kW) =  Pressure (bar) x Flow (lpm)                                                   600 x Efficiency (%)

Conversion Factors

LENGTH

 Multiply By To obtain inch 25.4 millimetres (mm) inch 0.0254 metres (m) foot 0.3048 metres (m) yards 0.9144 metres (m) mile 1.61 kilometres (km)

MASS (WEIGHT)

 Multiply By To obtain ounce 28.35 grams (gms) pound 0.454 kilograms (kg) ton (long) 2240 lbs 1,016.05 kilograms (kg) ton (short)2000 lbs 907.18 kilograms (kg) tonne 1,000 kilograms (kg)

VOLUME

 Multiply By To obtain gallon (Imp.) 4.55 litres (l) gallon (US) 3.785 litres (l) cubic inch 16.38 cubic centimetres (cm3) cubic inch 16.38 millilitres (ml) cubic foot 0.0283 cubic metres (m3) cubic foot 28.3 litres (l)

PRESSURE

 Multiply By To obtain lbs/sq.in. (psi) 0.069 bar lbs/sq.in. (psi) 6.9 kiloPascals (kPa) atmosphere (atm) 1.013 bar kg/sq.cm 98.1 kiloPascals (kPa) bar 100 kiloPascals (kPa) megaPascal (MPa) 10 bar inch mercury (Hg) 3.387 kiloPascals (kPa) foot water (H2O) 2.99 kiloPascals (kPa)

POWER & TORQUE

 Multiply By To obtain horsepower (hp) 0.7457 kilowatts (kW) foot lbs (lbf/ft) 1.356 Newton metres (Nm) inch lbs (lbf/in) 0.113 Newton metres (Nm)

FLOW

 Multiply By To obtain gal/min (Imp) 4.55 litres / min (lpm) gal/min (US) 3.785 litres / min (lpm) std.cu.ft./min (air) 0.472 litres / sec (l/sec)