---
title: "Mass-to-charge ratio: research glossary | Sable Peptides"
description: "The mass-to-charge ratio (m/z) is the quantity measured by a mass spectrometer: the mass of an ion divided by its charge number. Peptides analysed by elect"
canonical: https://www.sablepeptides.co.uk/glossary/mass-to-charge-ratio
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Mass-to-charge ratio

The mass-to-charge ratio (m/z) is the quantity measured by a mass spectrometer: the mass of an ion divided by its charge number. Peptides analysed by electrospray often carry several charges, so a single peptide appears as several peaks at different m/z values, from which the neutral mass is calculated.

Source: [en.wikipedia.org](https://en.wikipedia.org/wiki/Mass-to-charge_ratio)

## Related terms

-   [Peptide](/glossary/peptide)

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