Peptide dose math, shown in full
Free calculators and plain-English guides for mixing, dosing and storing peptides. Every figure is computed from the equations on the method page, not copied from another calculator.
- 3
- compounds modelled
- 2,411
- computed reference pages
- 7
- calculators, no account
What that looks like
A 10 mg vial in 2 mL of bacteriostatic water is 5 mg/mL, so a 2.5 mg dose is 50 units on a U-100 syringe. That vial holds 4 doses.
Run your own numbersWhy our numbers differ from other calculators
Absorption rate is rarely published, so most tools guess at it: at least one widely used calculator applies a single rate to all three compounds, putting peak concentration around nine hours after injection and contradicting the published pharmacokinetics of every one of them.
We solve each rate from the compound's reported time to peak instead, which puts retatrutide at 49 hours, and a test in the build fails if any compound drifts more than three hours from its documented value. The full method, including where the model is weakest.
When a number here changes, you hear about it
Occasional email: new calculators, new reference tables, and a note whenever a constant on this site is revised. No schedule, nothing else.