Reconstitution & Dilution Calculator
Work out concentration (mg/ml & mcg/ml) from vial strength and diluent volume, then the draw volume and U-100 syringe units for any target amount.
Open calculator →Molarity & Concentration Calculator
Convert between mass, volume and molar concentration (mM / µM) using molecular weight — with a built-in MW reference for common research peptides.
Open calculator →Stability & Storage Reference
Reconstituted and lyophilised storage windows, temperature guidance and freeze-thaw handling for common research peptides.
Coming soonSolution Preparation Worksheet
Plan a batch of stock solutions and printable aliquot records for your lab notebook.
Coming soonAbout these tools
These calculators are maintained by RS Bio Labs as a free resource for the peptide research community. They perform standard laboratory arithmetic — concentration, dilution and molarity — to help researchers prepare accurate stock solutions and measure aliquots. They are not dosing tools and do not provide medical or veterinary guidance.
For background theory, method notes and referenced literature, see the Peptide Knowledgebase and the reconstitution guide. Molecular weights and stability windows should always be confirmed against the Certificate of Analysis supplied with your specific compound.
The calculation logic behind these tools is free and open source under the MIT licence. Browse the code, run the standalone calculator, or use it in your own project on GitHub →
These tools support the preparation and measurement of laboratory research solutions. The compounds referenced are not for human consumption and nothing here constitutes dosing advice.
Maintained by RS Bio Labs · Peptide Knowledgebase · Shop