Wärtsilä Methane Number Calculator

We have developed this tool for ship owners and operators to calculate the Methane Number of the fuel gas.
The calculation result indicates whether or not the given gas quality is suitable for use in Wärtsilä gas and dual fuel engines.

Methane CH4
mol%
EthaneC2H6
 mol%
PropaneC3H8
 mol%
Iso-butane (2-Methylpropane)i-C4H10
 mol%
N-butanen-C4H10
 mol%
Iso-pentane (2-Methylbutane)i-C5H12
 mol%
N-pentanen-C5H12
 mol%
EthyleneC2H4
 mol%
PropyleneC3H6
 mol%
Neo-pentane (2,2-Dimethylpropane) neo-C5H12
 mol%
Mix-hexaneMix C6H14
 mol%
Mix-heptaneMix C7H16
 mol%
N-Octanen-C8H18
 mol%
Carbondioxide C02
 mol%
CarbonmonoxideC0
 mol%
HydrogenH2
 mol%
Nitrogen N2
 mol%
Hydrogen sulfideH2S
 mol%
Total mol%
Wärtsilä Methane number (WMN)
Propane Knock Index (PKI)
The calculation tool is owned by Wärtsilä and is made for customer use and is for guidance only. Changes in the tool is reserved at any time.
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