Convert
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One unit in every other unit
Convert a fuel between volume and mass using its density. Densities are kg per litre at reference conditions.
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Density varies with temperature and with the actual blend. Use a supplier or lab figure for anything reported or verified; these are screening defaults.
Energy content of a fuel quantity, on the gross calorific values used in national energy statistics.
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These are typical gross (higher) calorific values. Net (lower) calorific value is roughly 5% less for liquids and up to 10% less for natural gas. Check which basis your reporting framework requires.
Weight, gas volume and liquid volume for common industrial gases.
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One unit in every other unit
Nm³ is measured at 0 °C and 1 atm. SCF is measured at 70 °F and 1 atm. They are different reference conditions, so 1 Nm³ is not 35.31 SCF.
Metric prefixes
Definitions used
| Quantity | Definition |
|---|---|
| BTU | IT BTU, 1055.05585262 J |
| Calorie | Thermochemical, 4.184 J exactly |
| Nautical mile | International, 1852 m exactly |
| Horsepower | Mechanical, 550 ft·lbf/s = 745.69987158 W |
| Ton of refrigeration | 12 000 BTU/h = 3516.85 W |
| toe | 41.868 GJ exactly |
| Year | Julian, 365.25 days |
| Month | 365.25 ÷ 12 days = 30.4375 d |
| Standard atmosphere | 101 325 Pa exactly |
| Pound | 0.453 592 37 kg exactly |
Where a unit has more than one definition in circulation, the one above is used throughout and stated so your numbers are reproducible.