Free peptide and GLP-1 calculators
Dose-to-volume converters and half-life charts that run in your browser. Nothing you enter is sent or saved. They do arithmetic on the numbers your prescriber gave you and never suggest a dose.
- Peptide dose calculator: how many units to draw
Free peptide dose calculator. Enter the peptide in your vial, the water you added and your prescribed dose to get mL and U-100 syringe units.
- Injection dose calculator: turn mg into mL and units
Convert a prescribed dose to mL and syringe units for any vial with a strength on the label, such as a Zepbound vial or testosterone 200 mg/mL.
- Half-life calculator: estimate how much is left in your system
Free half-life calculator. Chart how much of a peptide or medication builds up and clears over repeated doses, from its half-life and your schedule.
- Testosterone half-life calculator: cypionate and enanthate
Estimate how testosterone cypionate or enanthate builds up and falls between injections. An illustrative half-life chart for your injection schedule.
- Tirzepatide and semaglutide level calculator
Estimate how Mounjaro, Zepbound, Wegovy or Ozempic builds up with weekly doses and clears after stopping. A free illustrative level chart.
The same maths, from your own doses
PepLevel remembers your vials and builds the level curve from the doses you log. Coming soon to the App Store.
Get PepLevel