JEOL MS Calculator

Exact mass to/from elemental composition. Calculated isotope distributions. Molecular weight to/from multiple charge ions.

Use the JEOL mass spectrometry calculator to calculate stable isotope distributions for a given elemental composition, calculate the possible elemental compositions for an accurate mass. You can also calculate m/z values for multiple charge ions from a molecular weight or molecular weight from two successive charge states. Please see the support page for instructions.