Nucleotide and oligonucleotide fragmentation calculatorCompute a, b, c, d, w, x, y and z fragment ion masses for DNA and RNA sequences, with configurable ionization and fragmentation, to interpret tandem mass spectra of nucleic acids. Please enable JavaScript to use the interactive application.

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Compounds for a molecular formula

Peptide and protein fragmentation calculator

Nucleotide and oligonucleotide fragmentation calculator

Polymer mass distribution calculator

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Mass spectrometry exercises

Determine the charge state — mass spectrometry exercises
Find the monoisotopic mass — mass spectrometry exercises
Determine the composition from the isotopic distribution
Determine the molecular formula — mass spectrometry exercises
Match spectra and molecules — electron-impact exercises

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Cite ChemCalc — Patiny L, Borel A. ChemCalc: a building block for tomorrow's chemical infrastructure. J Chem Inf Model. 2013. DOI: 10.1021/ci300563h

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