How CalcPeptides calculations work.

CalcPeptides uses transparent arithmetic formulas so visitors can check every calculator result. The site is designed for research math and education only, not medical, veterinary, treatment, administration, or safety decisions.

Unit conventions

The site uses keyboard-friendly unit labels: uL means microliter (µL) and mcg means microgram (µg). The key metric relationships are 1 mg = 1000 mcg and 1 mL = 1000 uL. Because both sides scale by 1000, 1 mg/mL has the same numeric concentration as 1 mcg/uL.

Core formulas

Reconstitution concentration: peptide mass in mg divided by diluent volume in mL equals concentration in mg/mL.

Amount from volume: concentration in mcg/uL multiplied by volume in uL equals amount in mcg.

Dilution: C1V1 = C2V2, where stock concentration multiplied by stock volume equals target concentration multiplied by final volume.

Cost: vial cost divided by total micrograms equals cost per mcg. Cost per planned research use equals cost per mcg multiplied by the planned microgram amount entered by the visitor.

Molecular weight: standard amino acid residue masses are summed and terminal water is added for an unmodified linear peptide estimate.

What the calculators do not verify

Calculator output does not verify a product source, label, certificate of analysis, concentration, diluent, route, protocol, pharmacy, prescription, clinical suitability, or safety. Results should be checked against validated documentation and qualified professional review.

References

Unit relationships are based on standard SI prefixes. See NIST SI prefix guidance. GLP-1 pages also reference FDA safety communications about unapproved GLP-1 drugs and compounded semaglutide dosing errors.