Peptide calculators

Estimates for sourcing work — final values must be confirmed against the batch COA.

Molecular weight from one-letter sequence

Average residue masses (Da) of the 20 standard amino acids plus water (18.02). Enter a sequence like GHK or RPKPQQFFGLM.

One-letter sequence

Stock concentration (C1, mg/mL)

Target concentration (C2, mg/mL)

Final volume (V2, mL)

See also: peptide content vs purity — why a 99% pure peptide can still carry a lower net content.