ISO 14912:2025
Gas Composition Converter
Enter a complete composition and choose an output basis. When the input or output uses volume fractions, specify the pressure and temperature for that composition. Select Calculate to convert.
Input
Input basis
Input scale
Enter percentages totalling 100.
| Component | Formula | Input (%) |
|---|---|---|
| Methane | CH4 | |
| Ethane | C2H6 | |
| Propane | C3H8 | |
| n-Butane | C4H10 | |
| Isobutane | C4H10 | |
| n-Pentane | C5H12 | |
| Isopentane | C5H12 | |
| n-Hexane | C6H14 | |
| Nitrogen | N2 | |
| Carbon dioxide | CO2 | |
| Hydrogen | H2 | |
| Carbon monoxide | CO | |
| Hydrogen sulfide | H2S | |
| Oxygen | O2 | |
| Water | H2O | |
| Argon | Ar | |
| Helium | He | |
| Entered total | 0 |
Input
| Component | Formula | Input (%) |
|---|---|---|
| Entered total | 0 | |
Result
Output basis
Output conditions
- Output basis
- Volume
- Absolute pressure
- 101.325 kPa
- Temperature
- 15 °C
Complete the composition and select Calculate to see the converted result.