Mass (m/z) calculation tools for lipid classes

Calculate the m/z value for a lipid ion of interest by choosing functional groups and ion type from the menu options below.
Structures and isotopic distribution profiles (formula hyperlink) are displayed on the results page along with the exact mass and molecular formula.

Note:Chains containing double bonds and/or functional groups with defined regiochemistry, geometry and stereochemistry are meant to serve as examples
for structure-drawing purposes. In many cases there may be alternative isobaric structures.
Fatty acids
Ion Acid Ester
   

Wax esters
Ion Alcohol Acid
   

Acyl carnitines
Ion Acyl chain
   

CoA esters
Ion Acyl chain
   

Glycerolipids
Ion sn1 sn2 sn3
   

Glycerophospholipids
Ion Headgroup sn1 sn2
   

Cardiolipins
Ion sn1(1') sn2(1')
    sn1(3') sn2(3')
   

Sphingolipids
Ion Headgroup Sphingoid base N-acyl
   

Cholesteryl esters
Ion Acyl chain
   

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