# Peptide Dose & Unit Converter — mcg, mg & IU | PepVault Source: https://pepvault.app/tools/peptide-dosage-calculator Last updated: 2026-09-29 [PepVault](https://pepvault.app/) [Free tools](https://pepvault.app/tools) Dose & unit converter Free tool · no signup # Peptide dose & unit converter Convert a peptide dose between micrograms (mcg), milligrams (mg), and IU — and see which unit each kind of compound is measured in. Your amount Example numbers 250 mcg equals 0.25 mg, or 0.75 IU for HGH only. The same amount 250 mcg = 0.25 mg - **IU · HGH only:** 0.75 IU 1 mg = 1,000 mcg. The IU figure applies **only** to HGH (somatropin), where the WHO standard is ~3 IU per mg — it is not valid for other peptides, which are dosed by mass. ## Which unit does my peptide use? Most research peptides are dosed in **micrograms (mcg)** or **milligrams (mg)** — BPC-157, TB-500, GHK-Cu, and the GH secretagogues (ipamorelin, CJC-1295) are all measured by mass. GLP-1 compounds like semaglutide and tirzepatide are dosed in **mg**. **IU (international units)** only applies to HGH, where potency historically came from a biological standard rather than mass. For everything else, ignore IU. The fourth number people confuse — **units on a syringe** — isn't a dose at all; it's a *volume* mark that depends on how you reconstituted the vial. To turn a dose into the units you draw, use the [reconstitution calculator](https://pepvault.app/tools/reconstitution-calculator). Example: 250 mcg is 0.25 mg, and for HGH only, 0.25 mg is 0.75 IU. ## Used most with - [HGH](https://pepvault.app/peptides/hgh) - [BPC-157](https://pepvault.app/peptides/bpc-157) - [TB-500](https://pepvault.app/peptides/tb-500) - [GHK-Cu](https://pepvault.app/peptides/ghk-cu) - [Ipamorelin](https://pepvault.app/peptides/ipamorelin) - [Semaglutide](https://pepvault.app/peptides/semaglutide) - [Tirzepatide](https://pepvault.app/peptides/tirzepatide) PepVault for iPhone ## Track this in PepVault Log every dose, manage your vials, and watch your protocol come together. 7 days free on the yearly plan for new subscribers. [Download on the App Store](https://apps.apple.com/app/apple-store/id6779318649?pt=129020030&ct=calc&mt=8) [or try the in-browser demo](https://pepvault.app/login) ## More free tools - [Reconstitution calculator](https://pepvault.app/tools/reconstitution-calculator) - [Reverse reconstitution](https://pepvault.app/tools/reverse-reconstitution-calculator) - [Half-life & active level](https://pepvault.app/tools/peptide-half-life-calculator) - [GLP-1 titration planner](https://pepvault.app/tools/glp1-titration-calculator) - [How long will my vial last?](https://pepvault.app/tools/how-long-will-my-vial-last) - [Missed a GLP-1 dose?](https://pepvault.app/tools/missed-glp1-dose) - [Is my mixed vial still good?](https://pepvault.app/tools/reconstituted-peptide-expiry) - [Protein on a GLP-1](https://pepvault.app/tools/glp1-protein-calculator) - [GLP-1 weight loss by week](https://pepvault.app/tools/glp1-weight-loss-by-week) - [Peptide reference library](https://pepvault.app/peptides) Choosing a tracker app? [Compare peptide tracker apps](https://pepvault.app/best-peptide-tracker-apps) · [Track what’s left in your vials](https://pepvault.app/peptide-vial-tracker-app) PepVault is a research and tracking resource, not medical advice. Ranges are what studies used, never a dose for you. Brand names are trademarks of their owners; PepVault is independent of them. For educational and tracking purposes only — not medical advice. Always verify calculations and consult a qualified clinician before changing any protocol. © 2026 PepVault