Water
1 litre weighs 1 kilogram
1 cubic metre weighs 1 tonne
1 UK gallon weighs 10.022 lb
1 US gallon weighs 8.345 lb
Energy
| 1000 British thermal units (Btu) | 0.293 kWh |
| 100000 Btu | 1 therm |
| 1 calorie (dieticians') | 4.1855 kilojoules |
Crude oil
| 1 barrel | 42 US gallons |
| 1 barrel | 34.97 UK (imperial) gallons |
| 1 barrel | 0.136 tonne (approx.) |
| 1 barrel per day | 50 tonnes per year approx. |
Precious metals
24 carat implies pure gold