# Peptide Vial Math

> Free peptide reconstitution calculator: vial mg + bacteriostatic water mL → concentration, mL and U-100 syringe units, with shareable results. Arithmetic only, never dosing advice.

Peptide Vial Math does reconstitution arithmetic only: concentration (mg/mL) = vial mg ÷ water mL; volume (mL) = amount mg ÷ concentration; U-100 units = mL × 100. It never recommends amounts or schedules. Canonical worked example: 10 mg + 2 mL = 5 mg/mL, so 2 mg = 0.4 mL = 40 units on a U-100 syringe.

Official site: https://peptidevialmath.com/ (canonical URLs use this apex host). Contact: hello@peptidevialmath.com; corrections: corrections@peptidevialmath.com; privacy: privacy@peptidevialmath.com. Written and reviewed by the Peptide Vial Math Editorial Team (an organization).

Full text: https://peptidevialmath.com/llms-full.txt

## Calculators
- [Peptide Calculator: Reconstitution & Dosage, mg to Units](https://peptidevialmath.com/): Free peptide calculator: enter vial mg, bacteriostatic water mL and the amount to measure. Get mg/mL, mL and U-100 syringe units instantly. Arithmetic only.
- [Peptide Calculators by Compound and Vial Size](https://peptidevialmath.com/calculators/): Every Peptide Vial Math calculator: 20 compounds and blends, per-vial-size pages for retatrutide, tirzepatide, semaglutide and BPC-157, plus converters.
- [Peptide Blend Calculator: mg per Component](https://peptidevialmath.com/calculators/blend/): Multi-peptide vial calculator. Enter each component’s mg, the water added and the syringe reading to see exactly how much of each component a draw contains.
- [IU Calculator: HGH & hCG Reconstitution, IU to Units](https://peptidevialmath.com/calculators/iu/): IU calculator for HGH and hCG vials: IU per mL, mL and U-100 syringe units, plus HGH IU to mg at the WHO standard 3 IU per mg. Arithmetic only.
- [BAC Water Calculator: How Much Water to Add](https://peptidevialmath.com/bacteriostatic-water/calculator/): Find how much bacteriostatic water to add so an amount reads a chosen number of units. Reverse calculator plus vial-by-vial water tables for 2–60 mg.
- [Retatrutide Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/retatrutide/): Retatrutide reconstitution calculator for 5, 10, 12, 15, 20, 24, 30, 40 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Tirzepatide Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/tirzepatide/): Tirzepatide reconstitution calculator for 5, 10, 15, 30, 60 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Semaglutide Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/semaglutide/): Semaglutide reconstitution calculator for 2, 5, 10, 20 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Cagrilintide Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/cagrilintide/): Cagrilintide reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [BPC-157 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/bpc-157/): BPC-157 reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [TB-500 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/tb-500/): TB-500 reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [GHK-Cu Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/ghk-cu/): GHK-Cu reconstitution calculator for 50, 100 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [KPV Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/kpv/): KPV reconstitution calculator for 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Ipamorelin Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/ipamorelin/): Ipamorelin reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [CJC-1295 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/cjc-1295/): CJC-1295 reconstitution calculator for 5 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Sermorelin Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/sermorelin/): Sermorelin reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Tesamorelin Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/tesamorelin/): Tesamorelin reconstitution calculator for 2, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [MOTS-c Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/mots-c/): MOTS-c reconstitution calculator for 10, 40 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [NAD+ Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/nad-plus/): NAD+ reconstitution calculator for 100, 500, 1000 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [AOD-9604 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/aod-9604/): AOD-9604 reconstitution calculator for 5 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Selank Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/selank/): Selank reconstitution calculator for 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Semax Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/semax/): Semax reconstitution calculator for 10, 30 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Epithalon Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/epithalon/): Epithalon reconstitution calculator for 10, 50 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Melanotan II Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/melanotan-2/): Melanotan II reconstitution calculator for 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [Melanotan I Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/melanotan-1/): Melanotan I reconstitution calculator for 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [PT-141 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/pt-141/): PT-141 reconstitution calculator for 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [IGF-1 LR3 Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/igf-1-lr3/): IGF-1 LR3 reconstitution calculator for 1 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [DSIP Dosage Calculator: Reconstitution, mg to Units](https://peptidevialmath.com/calculators/dsip/): DSIP reconstitution calculator for 5, 10 mg vials: mg/mL, mL and U-100 syringe units, with charts. Arithmetic only.
- [KLOW Peptide Calculator (80 mg): Per-Component Units](https://peptidevialmath.com/calculators/klow/): KLOW blend calculator: split any syringe reading into GHK-Cu, BPC-157, TB-500, KPV mg. Water-volume table and worked example. Arithmetic only.
- [GLOW Peptide Calculator (70 mg): Per-Component Units](https://peptidevialmath.com/calculators/glow/): GLOW blend calculator: split any syringe reading into GHK-Cu, BPC-157, TB-500 mg. Water-volume table and worked example. Arithmetic only.
- [How Much BAC Water for 5 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/5-mg/): How much bacteriostatic water for a 5 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 10 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/10-mg/): How much bacteriostatic water for a 10 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 12 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/12-mg/): How much bacteriostatic water for a 12 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 15 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/15-mg/): How much bacteriostatic water for a 15 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 20 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/20-mg/): How much bacteriostatic water for a 20 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 24 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/24-mg/): How much bacteriostatic water for a 24 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 30 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/30-mg/): How much bacteriostatic water for a 30 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 40 mg Retatrutide? Calculator](https://peptidevialmath.com/calculators/retatrutide/40-mg/): How much bacteriostatic water for a 40 mg Retatrutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 5 mg Tirzepatide? Calculator](https://peptidevialmath.com/calculators/tirzepatide/5-mg/): How much bacteriostatic water for a 5 mg Tirzepatide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 10 mg Tirzepatide? Calculator](https://peptidevialmath.com/calculators/tirzepatide/10-mg/): How much bacteriostatic water for a 10 mg Tirzepatide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 15 mg Tirzepatide? Calculator](https://peptidevialmath.com/calculators/tirzepatide/15-mg/): How much bacteriostatic water for a 15 mg Tirzepatide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 30 mg Tirzepatide? Calculator](https://peptidevialmath.com/calculators/tirzepatide/30-mg/): How much bacteriostatic water for a 30 mg Tirzepatide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 60 mg Tirzepatide? Calculator](https://peptidevialmath.com/calculators/tirzepatide/60-mg/): How much bacteriostatic water for a 60 mg Tirzepatide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 2 mg Semaglutide? Calculator](https://peptidevialmath.com/calculators/semaglutide/2-mg/): How much bacteriostatic water for a 2 mg Semaglutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 5 mg Semaglutide? Calculator](https://peptidevialmath.com/calculators/semaglutide/5-mg/): How much bacteriostatic water for a 5 mg Semaglutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 10 mg Semaglutide? Calculator](https://peptidevialmath.com/calculators/semaglutide/10-mg/): How much bacteriostatic water for a 10 mg Semaglutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 20 mg Semaglutide? Calculator](https://peptidevialmath.com/calculators/semaglutide/20-mg/): How much bacteriostatic water for a 20 mg Semaglutide vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 5 mg BPC-157? Calculator](https://peptidevialmath.com/calculators/bpc-157/5-mg/): How much bacteriostatic water for a 5 mg BPC-157 vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.
- [How Much BAC Water for 10 mg BPC-157? Calculator](https://peptidevialmath.com/calculators/bpc-157/10-mg/): How much bacteriostatic water for a 10 mg BPC-157 vial: 1, 2 or 3 mL, the mg/mL and mg per unit each gives, a units chart and a preset calculator.

## Converters
- [Peptide Unit Converters: mg, mcg, mL and Syringe Units](https://peptidevialmath.com/convert/): Three two-way converters for reconstitution arithmetic: mg to syringe units, mcg to mg, and units to mL on U-100, U-50 and U-40 syringes.
- [mg & mcg to Units Calculator (U-100 Syringe) for Peptides](https://peptidevialmath.com/convert/mg-to-units/): Convert milligrams to insulin-syringe units at any concentration. 1 mg at 5 mg/mL = 0.2 mL = 20 units on U-100. Two-way converter with formula and charts.
- [mcg to mg Converter: Micrograms to Milligrams](https://peptidevialmath.com/convert/mcg-to-mg/): Convert micrograms to milligrams and back. 1 mg = 1,000 mcg, so 250 mcg = 0.25 mg. Two-way converter, conversion chart and the mistakes to avoid.
- [Units to mL: Insulin Syringe Conversion (U-100, U-40)](https://peptidevialmath.com/convert/units-to-ml/): Convert insulin-syringe units to milliliters. On a U-100 syringe 100 units = 1 mL, so 10 units = 0.1 mL. Covers U-50 and U-40 scales with a full chart.
- [How Many Units Is 2.5 mg of Tirzepatide? (U-100 Chart)](https://peptidevialmath.com/convert/2-5-mg-tirzepatide-to-units/): 2.5 mg of Tirzepatide in syringe units for every Tirzepatide vial size and 1, 2 or 3 mL of water, with a worked example. Arithmetic only, not a dose.
- [2.5 mg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/2-5-mg-to-units/): How many units is 2.5 mg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [10 Units to mL: U-100, U-50 and U-40 Syringes](https://peptidevialmath.com/convert/10-units-to-ml/): 10 units is 0.1 mL on a U-100 insulin syringe, 0.2 mL on U-50 and 0.25 mL on U-40. Chart, worked example and the common mix-ups.
- [50 Units to mL: U-100, U-50 and U-40 Syringes](https://peptidevialmath.com/convert/50-units-to-ml/): 50 units is 0.5 mL on a U-100 insulin syringe, 1 mL on U-50 and 1.25 mL on U-40. Chart, worked example and the common mix-ups.
- [10 Units to mg: Peptide Syringe Chart by Concentration](https://peptidevialmath.com/convert/10-units-to-mg/): How many mg is 10 units? It is 0.1 mL on U-100, so the mg depends on concentration. Chart for common vial and water combinations, with a worked example.
- [20 Units to mg: Peptide Syringe Chart by Concentration](https://peptidevialmath.com/convert/20-units-to-mg/): How many mg is 20 units? It is 0.2 mL on U-100, so the mg depends on concentration. Chart for common vial and water combinations, with a worked example.
- [5 mg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/5-mg-to-units/): How many units is 5 mg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [0.5 mg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/0-5-mg-to-units/): How many units is 0.5 mg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [500 mcg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/500-mcg-to-units/): How many units is 500 mcg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [0.25 mg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/0-25-mg-to-units/): How many units is 0.25 mg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [250 mcg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/250-mcg-to-units/): How many units is 250 mcg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [200 mcg to Units: U-100 Syringe Chart by Concentration](https://peptidevialmath.com/convert/200-mcg-to-units/): How many units is 200 mcg? It depends on the concentration. U-100 chart for 5, 10 and 20 mg vials in 1, 2 or 3 mL of water, with a worked example.
- [How Many Units Is 2 mg of Retatrutide? (U-100 Chart)](https://peptidevialmath.com/convert/2-mg-retatrutide-to-units/): 2 mg of Retatrutide in syringe units for every Retatrutide vial size and 1, 2 or 3 mL of water, with a worked example. Arithmetic only, not a dose.
- [How Many Units Is 0.25 mg of Semaglutide? (U-100 Chart)](https://peptidevialmath.com/convert/0-25-mg-semaglutide-to-units/): 0.25 mg of Semaglutide in syringe units for every Semaglutide vial size and 1, 2 or 3 mL of water, with a worked example. Arithmetic only, not a dose.

## Guides
- [How to Reconstitute Peptides: Steps and Math](https://peptidevialmath.com/reconstitution/): How peptide reconstitution works in the lab: materials, aseptic steps, choosing a bacteriostatic water volume and the concentration math, with worked examples.
- [Bacteriostatic Water: What It Is, Uses, Shelf Life](https://peptidevialmath.com/bacteriostatic-water/): Bacteriostatic water is sterile water with 0.9% benzyl alcohol. What the FDA-listed label says, how it differs from sterile water, the 28-day rule and the math.
- [Insulin Syringe Units Explained: U-100 vs U-40](https://peptidevialmath.com/syringes/): How insulin-syringe units work: U-100 means 100 units per mL, so 1 unit = 0.01 mL. Barrel sizes, tick marks, U-40 vs U-100 and the errors FDA has reported.
- [Peptide Storage: Lyophilized vs Reconstituted](https://peptidevialmath.com/storage/): How research peptides are stored before and after reconstitution: temperature, light, moisture, frozen aliquots and how long an opened vial is kept.
- [How to Reconstitute Retatrutide: Water by Vial Size](https://peptidevialmath.com/reconstitution/retatrutide/): How to reconstitute Retatrutide vials: the lab steps, a vial-size × water concentration matrix, mg per unit and a preset calculator. Arithmetic only.
- [How to Reconstitute Tirzepatide: Water by Vial Size](https://peptidevialmath.com/reconstitution/tirzepatide/): How to reconstitute Tirzepatide vials: the lab steps, a vial-size × water concentration matrix, mg per unit and a preset calculator. Arithmetic only.
- [How to Reconstitute Semaglutide: Water by Vial Size](https://peptidevialmath.com/reconstitution/semaglutide/): How to reconstitute Semaglutide vials: the lab steps, a vial-size × water concentration matrix, mg per unit and a preset calculator. Arithmetic only.

## About
- [Methodology: Formulas, Rounding and Testing](https://peptidevialmath.com/methodology/): How Peptide Vial Math calculates: the three formulas, rounding and display rules, syringe tick assumptions, where vial sizes come from and the unit tests.
- [Disclaimer: Arithmetic Only, Research Use Only](https://peptidevialmath.com/disclaimer/): Peptide Vial Math performs unit arithmetic only. It does not give medical, dosing or legal advice. Read the full research-use and no-medical-advice disclaimer.
- [Disclosures: Ownership, Money and Independence](https://peptidevialmath.com/disclosures/): Who runs Peptide Vial Math, how it is funded, our no-vendor-links and no-rankings policy, affiliate rules and how ownership interests are disclosed.
- [Contact Peptide Vial Math: Corrections and Email](https://peptidevialmath.com/contact/): Email addresses for corrections to a formula or table, privacy requests and general questions. No forms, no accounts, and no dosing questions answered.
- [Privacy Policy: Calculations Stay in Your Browser](https://peptidevialmath.com/privacy/): No accounts or ad scripts; calculations run in your browser. What the optional email signup stores, what your device keeps and what server logs record.
- [Consumer Health Data Notice: No Health Data Collected](https://peptidevialmath.com/consumer-health-data/): Peptide Vial Math does not collect health data: calculator inputs are never stored, and the optional email signup keeps only your email address.
- [Terms of Use: Arithmetic Only, Check Every Number](https://peptidevialmath.com/terms/): Terms for using Peptide Vial Math: arithmetic only, research use only, no medical or dosing advice, no warranty, and reuse with attribution.
- [About Peptide Vial Math and the Editorial Team](https://peptidevialmath.com/about/): Peptide Vial Math builds accurate, accessible reconstitution calculators. Who writes and checks the pages, how corrections work and what we never publish.