# 9. CONVERSION FACTORS

 To obtain From Multiply by the following 3.281 metres feet 0.3048 10.76 square metres square feet 0.0929 35.32 cubic metres cubic feet 0.0283 0.22 litres UK gallons 4.546 0.264 litres US gallons 3.785 2.205 kilogrammes pounds 0.454 1.016 metric ton ton 0.984 0.00142 kilogrammes per square metre pounds per square inch 703 3.97 kilocalories British thermal units 0.252 1.341 kilowatts horsepower 0.746 0.00156 kilocalories per hour horsepower 642 0.001163 kilocalories per hour kilowatts 860 0.0003307 kilocalories per hour tons of refrigeration (US) 3.024 Multiply by the above to convert to

The International systems of Units (SI Units) is now widely used and some conversions relating to the above units are given below:

 Mass 1 metric ton = 1 ton = 0.984 tons (UK) Pressure 1 kg/mē = 1 kgf/mē = 1 kp/mē = 9.807 Pascal (Pa) = 9.807 Newton/mē(N/mē) Energy 1 cal = 4.187 Joules (J) 1 kWh = 3.6 Megajoules (MJ) 1 Btu = 1.055 kilojoules (kJ) Power 1 hp (UK or US) = 0.746 kW = 0.746 Joules/second (J/s) 1 hp (metric) = 0.736 kW = 0.736 J/s 1 Watt (W) = 1 J/s Heat Flow Rate 1 kcal/h = 1.163 J/s = 1.163 W 1 Btu/h = 0.293 J/s = 0.293 W