Methane Number Calculator

Calculate the methane number (MN_C) of natural gas, biogas, biomethane, and hydrogen-containing gas mixtures according to ISO 17507-1. Enter a gas composition as volume fractions and get a standardized MN_C result for comparison, evaluation, and technical review. Please read the disclaimer before relying on any result.

Enter the gas composition as volume, mole, or mass fractions. Empty fields are treated as zero. The entered fractions are converted to volume fractions and normalized to percent before the ISO 17507-1 calculation is performed.