ISO 14912:2025 · Gas analysis
Gas Composition Converter
Convert a complete gas composition between mole, mass, and volume fractions. The converter handles normalization and the required component property data.
Why ISO 14912?
The same gas mixture can be expressed in different ways, but its mole, mass, and volume fractions are not always interchangeable. Volume fractions also depend on pressure and temperature.
ISO 14912:2025 provides defined procedures for converting gas composition data between these measures and conditions, including methods that account for real-gas behaviour. This tool makes the applicable fraction conversions available in a practical calculator.