# Free Peptide Calculators — reconstitution, dose & half-life

Source: https://pepvault.app/tools

Last updated: 2026-09-29

[PepVault](https://pepvault.app/) Free tools

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# Free peptide calculators

Accurate, no-nonsense tools for reconstitution and dosing — free, no account, no email. The same math that powers PepVault, the peptide tracker.

## The Lab.

- Lab · Dose Guide

  ### [Dose Guide.](https://pepvault.app/lab/dosage)

  Each peptide’s range, and the units on your syringe.

  Open the guide
- Lab · Injection guide

  ### [Injection Guide.](https://pepvault.app/lab/injection)

  See where the needle goes, layer by layer.

  Open the guide
- Lab · Tier list

  ### [Tier list maker.](https://pepvault.app/lab/tiers)

  Rank the peptides you rate. Share the picture.

  Make yours
- Lab · Reconstitution

  ### [Reconstitution Lab.](https://pepvault.app/lab)

  Mix your vial. Draw the exact units.

  Open the Reconstitution Lab
- Lab · Peptide Sky

  ### [Peptide Sky.](https://pepvault.app/lab/sky)

  53 peptides as stars. Fly into a molecule.

  Fly in

## Calculators.

- Tool · Calculator

  ### [Reconstitution calculator.](https://pepvault.app/tools/reconstitution-calculator)

  Enter your vial, water and dose for the exact units to draw, the concentration, the doses per vial and the best water for a clean syringe mark.

  Open the calculator
- Tool · Calculator

  ### [Reverse reconstitution calculator.](https://pepvault.app/tools/reverse-reconstitution-calculator)

  Already mixed and drew some units? Work backwards from your vial, water and units to exactly what dose that draw is, in mcg and mg.

  Open the calculator
- Tool · Calculator

  ### [Half-life & active-level calculator.](https://pepvault.app/tools/peptide-half-life-calculator)

  See how a compound builds to steady state at your dose and schedule — estimated active level over time, peak and trough.

  Open the calculator
- Tool · Calculator

  ### [GLP-1 titration schedule planner.](https://pepvault.app/tools/glp1-titration-calculator)

  The standard dose-escalation ramps for semaglutide, tirzepatide, and retatrutide — week by week, at the pace you choose.

  Open the planner
- Tool · Calculator

  ### [Dose & unit converter.](https://pepvault.app/tools/peptide-dosage-calculator)

  Convert a peptide dose between mcg, mg, and IU — and see which unit each kind of compound is measured in.

  Open the converter

Library

[Peptide reference library](https://pepvault.app/peptides)

Reference guides for 69 compounds: dose ranges, safety notes and stacks, with half-lives and reconstitution examples where they apply.

## Questions, answered.

- [How long will my vial last? The doses in your vial at your dose, the days they cover at your schedule, and the date of the last one.](https://pepvault.app/tools/how-long-will-my-vial-last)
- [I missed my GLP-1 dose. Now what? The Ozempic, Wegovy, Mounjaro and Zepbound labels’ own missed-dose rules, quoted, and which case your dates fall in.](https://pepvault.app/tools/missed-glp1-dose)
- [Is my mixed peptide vial still good? The days since you mixed it, against the CDC’s 28-day limit for an opened multi-dose vial.](https://pepvault.app/tools/reconstituted-peptide-expiry)
- [How much protein on a GLP-1? A daily protein range for your weight, from the 2025 joint advisory on nutrition for GLP-1 users.](https://pepvault.app/tools/glp1-protein-calculator)
- [GLP-1 weight loss by week: where should I be? The trials’ average weight lost, week by week, drawn from your own starting weight.](https://pepvault.app/tools/glp1-weight-loss-by-week)

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)

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