Peptide unit converter
Convert peptide amounts between µg, mg and nanomoles using molecular weights, for laboratory record-keeping and for reading studies that report doses in different units.
Not a personalised dose calculator. Not for human or animal administration.
Dose unit converter
MW: 1419.5 Da
Equivalent values
- In µg
- 250.00 µg
- In mg
- 0.2500 mg
- In nanomoles
- 176.118 nmol
Molecular weights from published peptide databases. IU conversions for peptides are compound-specific and not universally defined — use µg / mg / nmol for research protocols. For laboratory research use only.
Why nmol matters in receptor binding research
Most peptide research literature reports doses in µg or mg per kg body weight. When you're comparing across compounds with very different molecular weights — for example, a 339 Da copper tripeptide (GHK-Cu) against a 4,813 Da incretin (Tirzepatide) — equal µg masses correspond to wildly different molar amounts. For receptor-binding research, the molar (nmol) value is the comparable unit, not the mass.
Molecular weight sources
Molecular weights used in this calculator are sourced from peer-reviewed peptide characterisation papers and the UniProt protein database. They are pure-peptide values; lyophilised vials typically contain trace mannitol or other excipients, which are not corrected for here.