Molecular Formula Calculator

This calculator has been created to assign molecular formulas from high-resolution mass spectrometry of predominately organic samples. As such, only the elements listed below are programmed in. To limit the amount that is displayed, unreasonable guesses with O:C greater than 2, N:C greater than 2, and H:C less than 0.2 are omitted.

Enter Measured m/z:
#C: 0 10 20 30 40 #H: 5 10 20 30 40 #N: 0 1 3 5 #O: 0 2 4 6 8 10 12

#Na: 0 1 2 #S: 0 2 #Cl: 0 2

Charge: -1 0 +1

Mass Tolerance: 0.1 ppm 0.2 ppm 0.5 ppm 1 ppm 2 ppm 5 ppm 10 ppm

If you would like any elements added please contact info{at}daltonian.co.