Page 329 - Fluid Mechanics and Thermodynamics of Turbomachinery

APPENDIX 1

Conversion of British Units to

SI Units

Length Force
1 inch D 0.0254 m 1 lbf D 4.448 N
1 foot D 0.3048 m 1 ton f (UK) D 9.964 kN

Area Pressure
1in 2 D 6.452 ð 10 4 m 2 1 lbf/in 2 D 6.895 kPa
1ft 2 D 0.09290 m 2 1ft H 2 O D 2.989 kPa
1in Hg D 3.386 kPa
1 bar D 100.0 kPa

Volume Energy
1in 3 D 16.39 cm 3 1 ft lbf D 1.356 J
1ft 3 D 28.32 dm 3 1 Btu D 1.055 kJ
D 0.02832 m 3
1 gall (UK) D 4.546 dm 3

Velocity Specific energy
1 ft/s D 0.3048 m/s 1 ft lbf/lb D 2.989 J/kg
1 mile/h D 0.447 m/s 1 Btu/lb D 2.326 kJ/kg

Mass Specific heat capacity
1lb D 0.4536 kg 1 ft lbf/(lb ° F) D 5.38 J/(kg ° C)
1 ton (UK) D 1016 kg 1 ft lbf/(slug ° F) D 0.167 J/(kg ° C)
1 Btu/(lb ° F) D 4.188 kJ/(kg ° C)

Density Power
1 lb/ft 3 D 16.02 kg/m 3 1hp D 0.7457 kW
1 slug/ft 3 D 515.4 kg/m 3

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