ISO 17507-1:2025 · MNc method

MNc Methane Number Calculator

Enter the complete gas composition by volume, mole, or mass. The composition is converted according to ISO 14912:2025 and prepared for calculation using the MNc method in ISO 17507-1:2025. The result is calculated when you select Calculate. Read the disclaimer before relying on a result.

Method · Validation

Input

Input help
Input basis
Input scale

Enter percentages totalling 100.

ComponentFormulaInput (%)
MethaneCH4
EthaneC2H6
PropaneC3H8
n-ButaneAlso used for ButanesC4H10
n-PentaneAlso used for PentanesC5H12
n-HexaneAlso used for Hexanes+C6H14
NitrogenN2
Carbon dioxideCO2
HydrogenH2
Carbon monoxideCO
Hydrogen sulfideH2S
EtheneC2H4
PropeneC3H6
1,3-ButadieneAlso used for ButadieneC4H6
1-ButeneAlso used for ButyleneC4H8
ArgonAr
HeliumHe
Entered total0

Input

Input basis
Volume
Input scale
Percent
Absolute pressure
101.325 kPa
Temperature
0 °C
ComponentFormulaInput (%)
Entered total0

Result

Complete the composition and select Calculate to see the result.