Peptide Calculator by Mark 🧬 Peptide Calculator Calculate the molecular weight, molarity, and mass-volume relationships of peptides. Peptide Sequence: Mass (mg): Volume (mL): Purity (%): Calculate Calculation Breakdown: * Molecular weight is calculated based on standard amino acid weights. Purity is factored into molarity calculations. Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Like this:Like Loading... Related