| 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/m� | = 1 kgf/m� = 1 kp/m� = 9.807 Pascal (Pa) = 9.807 Newton/m�(N/m�) |
| 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 |
