# Technical information

## Imperial/Metric Conversion Table

Common conversion factors from imperial units to metric SI units:

 Unit inch foot yard mm cm m square inch (in²) square foot (ft²) square yard (yd²) mm² m² cubic inch (in³) cubic foot (ft³) cubic yard (yd³) pint cm³ m³ ft/min ft/s m/s m/min oz lb ton g kg Btu ft/ft²h°F W/m°C gal/h m³/h Btu/lb°F ft lbf/lb°F J/kg°C Btu/lb ft lbf/lb J/kg lb/in³ lb/ft³ lb/gal Btu/lb°R J/kg K therm hph (horsepower x hour) kWh Btu (British thermal unit) cal (calorie I.T.) J KJ MJ Convertor inch foot yard mm cm m square inch (in²) square foot (ft²) square yard (yd²) mm² m² cubic inch (in³) cubic foot (ft³) cubic yard (yd³) pint cm³ m³ ft/min ft/s m/s m/min oz lb ton g kg Btu ft/ft²h°F W/m°C gal/h m³/h Btu/lb°F ft lbf/lb°F J/kg°C Btu/lb ft lbf/lb J/kg lb/in³ lb/ft³ lb/gal Btu/lb°R J/kg K therm hph (horsepower x hour) kWh Btu (British thermal unit) cal (calorie I.T.) J KJ MJ
 Length 1 inch = 25.4mm 1 foot = 0.3048m 1 yard = 0.9144m Area 1 in² (square inch) = 645.16mm² 1 ft² (square foot) = 0.0929030m² 1 yd² (square yard) = 0.836127m² Volume,capacity 1 in³ (cubic inch) = 16.3871cm³ 1 ft³ (cubic foot) = 0.0283168m³ 1 yd³ (cubic yard) = 0.764555m³ 1 Pint = 0.568261m³ Velocity 1 ft/min = 0.00508m/s or 0.3048m/min 1 ft/s = 0.3048m/s Mass 1 oz = 28.3495g 1 lb = 0.45359237kg 1 ton (2240lb) = 1016.05kg Thermal Conductivity 1 Btu ft/ft²h°F = 1.73073 W/m°C (Jm/m²s°C) Volume rate of flow 1 gal/h = 4.5609m³/h Thermal capacity per unit mass, specific heat capacity 1 Btu/lb°F = 4186.8 J/kg°C 1 ft lbf/lb°F = 5.38032J/kg°C Specific energy, specific latent heat 1 Btu/lb = 2326 J/kg 1 ft lbf/lb = 2.98907 J/kg Density 1 lb/in³ = 27.6799Mg/m³ 1 lb/ft³ = 16.0185 kg/m³ 1 lb/gal = 99.7763kg/m³ Specific entropy 1 Btu/lb°R = 4186.8 J/kg K Energy, work, quantity of heat 1 therm = 105.506 MJ hph (horsepower x hour) = 2.68452 MJ 1 kWh = 3.6MJ 1 Btu (British thermal unit) = 1.05506kJ 1 cal (calorie I.T.) = 4.1868J

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