Fluid Mechanics and Thermodynamics of Turbomachinery, 5e

APPENDIX 1
Conversion of British Units to
SI Units
Length Force
1 inch = 0.0254m 1lbf = 4.448N
1 foot = 0.3048m 1ton f (UK) = 9.964kN
Area Pressure
1in 2 = 6.452 ¥ 10 -4 m 2 1lbf/in 2 = 6.895kPa
1ft 2 = 0.09290m 2 1ft H 2O = 2.989kPa
1inHg = 3.386kPa
1bar = 100.0kPa
Volume Energy
1in 3 = 16.39cm 3 1ftlbf = 1.356J
1ft 3 = 28.32dm 3 1Btu = 1.055kJ
= 0.02832m 3
1 gall (UK) = 4.546dm 3
Velocity Specific energy
1ft/s = 0.3048m/s 1ftlbf/lb = 2.989J/kg
1 mile/h = 0.447m/s 1Btu/lb = 2.326kJ/kg
Mass Specific heat capacity
1lb = 0.4536kg 1ftlbf/(lb °F) = 5.38J/(kg °C)
1 ton (UK) = 1016kg 1ftlbf/(slug °F) = 0.167J/(kg °C)
1Btu/(lb °F) = 4.188kJ/(kg °C)
Density Power
1lb/ft 3 = 16.02kg/m 3 1hp = 0.7457kW
1slug/ft 3 = 515.4kg/m 3
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