Accurate Peptide Calculations in Seconds – No More Manual Math Errors!
Stop wasting time with spreadsheets and unreliable formulas. Our free, peer-reviewed peptide calculator gives you instant, precise results for:
✅ Molecular weight (with modifications)
✅ Molarity & mass concentration
✅ Amino acid composition
✅ Solution prep adjustments
Used by 10,000+ researchers worldwide – because science should be about discovery, not calculation headaches.
Enter your sequence below and get results faster than you can pipette!“
Peptide Calculator
Calculate molecular weight, molarity, and other peptide properties
Peptide Information
Single-letter amino acid codes only
Results
Enter peptide sequence and click “Calculate” to see results
How to Use
- Enter the peptide sequence using single-letter amino acid codes (e.g., “ACDEFGHIKLMNPQRSTVWY”)
- Optionally specify modifications like acetylation or amidation
- Enter the amount of peptide in milligrams and the volume of solution in milliliters
- Specify the purity percentage if your peptide is not 100% pure
- Click “Calculate” to see molecular weight, molarity, and other properties
