---
title: "Dalton: research glossary | Sable Peptides"
description: "The dalton (Da), or unified atomic mass unit (u), is a unit of mass defined as one twelfth of the mass of a neutral carbon-12 atom, approximately 1.6605 ×"
canonical: https://www.sablepeptides.co.uk/glossary/dalton
publisher: Sable Peptides Limited (UK company 17488610)
note: Research use only. Not for human or veterinary use.
---

Glossary

# Dalton

The dalton (Da), or unified atomic mass unit (u), is a unit of mass defined as one twelfth of the mass of a neutral carbon-12 atom, approximately 1.6605 × 10⁻²⁷ kg. Peptide and protein masses are commonly expressed in daltons or kilodaltons (kDa). A mass of 1 Da corresponds numerically to 1 g/mol.

Source: [en.wikipedia.org](https://en.wikipedia.org/wiki/Dalton_\(unit\))

## Related terms

-   [Peptide](/glossary/peptide)

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