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 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.
© 2018 Wärtsilä