guides Last updated: 8 Jun 2026

Tirzepatide Reconstitution Calculator & Guide: How to Mix Compounded Tirz

Name: Tirzepatide Reconstitution Calculator & Guide: How to Mix Compounded Tirz
Creator: Tom Hill
Published: 2026-02-05T00:00:00Z

Free tirzepatide reconstitution calculator plus step-by-step guide. Learn how to mix compounded tirzepatide with BAC water, calculate insulin units, and store properly. 30mg vial charts included.

Reconstitution supplies: BAC water, tirzepatide vial, syringe, alcohol swabs, and step-by-step mixing card

Written by

Tom Hill

Founder & Editor, GLP3 Planner

Tom writes about GLP-1 protocols because he couldn't find clear answers when he needed them. After months of digging through clinical trials, FDA filings, peer-reviewed pharmacology research, and community discussions to piece together his own protocol, he started GLP3 Planner to consolidate what he'd learned. Tom isn't a doctor, and the site doesn't pretend otherwise. Every article cites the primary sources behind its claims, and dosing guidance is cross-referenced against published trial data. He covers semaglutide, tirzepatide, retatrutide, and reconstitution. Articles get revised when new data lands. Always read the full citations and talk to a clinician before starting anything.

Last updated 8 Jun 2026

Last medically reviewed: 2026-06-08 by GLP3 Planner editorial. References inline as available.

← Tirzepatide Hub Reconstitution Calculator →

Key Takeaways

Popular concentration: 30mg tirzepatide + 3mL BAC water = 10mg/mL (easy math for dosing)
Injection technique: Add water slowly down the vial wall, never directly onto powder
Mixing method: Gently swirl (never shake) until fully dissolved (1-5 minutes)
Storage: Refrigerate at 36-46°F (2-8°C), stable for 28-60 days
Use our free calculator to get exact insulin units for any concentration, or the tirzepatide dose-to-units calculator to convert a specific mg dose to syringe units
Switching from a Mounjaro or Zepbound pen? The pen-to-vial calculator converts your weekly pen dose into the units to draw from your vial, with switch-week timing

💡 Compounded vs. Brand: FDA-approved Mounjaro and Zepbound come in pre-filled pens that don't require reconstitution. This guide is for compounded tirzepatide, which comes as lyophilized (freeze-dried) powder and must be mixed with bacteriostatic water before use.

What is Tirzepatide Reconstitution?

Reconstitution means adding bacteriostatic water (BAC water) to freeze-dried tirzepatide powder to create an injectable solution. Many people use compounded tirzepatide because it costs less and is easier to get than brand-name Mounjaro or Zepbound.

To use compounded tirzepatide, you need to:

Determine the right BAC water volume for your desired concentration
Properly mix the solution without damaging the peptide
Calculate insulin units for accurate dosing
Store correctly to maintain potency

Our free tirzepatide reconstitution calculator handles all the math. Enter your vial size, BAC water amount, and desired dose to get exact insulin units.

Tirzepatide Reconstitution Calculator

Use our free calculator to determine BAC water volume and insulin units for any tirzepatide concentration.

Free Reconstitution Calculator

Works for any vial size: 5mg, 10mg, 15mg, 30mg, 45mg, 60mg

Reconstitution Chart Calculator → Save Your Vial (Log In) →

30mg tirzepatide reconstitution: 30mg vial + 3mL BAC water = 10mg/mL concentration — 30mg tirzepatide + 3mL BAC water = 10mg/mL (recommended concentration)

30mg Tirzepatide Reconstitution Chart

30mg vials are the most popular compounded tirzepatide size. Here are common reconstitution options:

BAC Water	Concentration	2.5mg Dose	5mg Dose	7.5mg Dose	10mg Dose
2mL	15mg/mL	16.7 IU	33.3 IU	50 IU	66.7 IU
3mL ⭐	10mg/mL	25 IU	50 IU	75 IU	100 IU
6mL	5mg/mL	50 IU	100 IU	150 IU	200 IU

⭐ Recommended: 3mL gives 10mg/mL, easy math for all standard doses. Use our calculator for other vial sizes.

Tirzepatide vial sizes comparison: 5mg, 10mg, 15mg, 30mg, 45mg, 60mg — Common tirzepatide vial sizes with BAC water and syringe

Other Common Tirzepatide Vial Sizes

Vial Size	Recommended BAC	Concentration	5mg = IU	Doses per Vial
5mg	1mL	5mg/mL	100 IU	1 dose
10mg	2mL	5mg/mL	100 IU	2 doses
15mg	3mL	5mg/mL	100 IU	3 doses
30mg	3mL	10mg/mL	50 IU	6 doses
45mg	3mL	15mg/mL	33.3 IU	9 doses
60mg	3mL	20mg/mL	25 IU	12 doses

How Much BAC Water for 30mg and 60mg Tirzepatide

The two questions we see most often are how much BAC water to mix with a 30mg vial and how much to mix with a 60mg vial. Both come down to the concentration you want. The easiest math, and the one most people pick, is 10mg/mL: it makes every standard dose land on a round insulin-unit number.

How much BAC water do you mix with 30 mg of tirzepatide? Add 3mL of bacteriostatic water to a 30mg vial. That gives 10mg/mL, so 5mg = 50 IU and 10mg = 100 IU on a U-100 insulin syringe.

30mg Tirzepatide: BAC Water Options

BAC Water	Concentration	5mg = IU	7.5mg = IU	10mg = IU
3mL ⭐	10mg/mL	50 IU	75 IU	100 IU
2mL	15mg/mL	33.3 IU	50 IU	66.7 IU
6mL	5mg/mL	100 IU	150 IU	200 IU

How much BAC water do you mix with 60 mg of tirzepatide? Add 6mL of bacteriostatic water to a 60mg vial for the same easy 10mg/mL concentration (5mg = 50 IU, 10mg = 100 IU). If you prefer a smaller injection volume, 3mL gives a concentrated 20mg/mL (5mg = 25 IU, 10mg = 50 IU).

60mg Tirzepatide: BAC Water Options

BAC Water	Concentration	5mg = IU	10mg = IU	15mg = IU
6mL ⭐	10mg/mL	50 IU	100 IU	150 IU
3mL	20mg/mL	25 IU	50 IU	75 IU
4mL	15mg/mL	33.3 IU	66.7 IU	100 IU

⭐ Recommended: 6mL on a 60mg vial keeps you at 10mg/mL, the same round-number math as the popular 30mg setup. Want a different concentration? Our calculator works it out for any vial size.

Supplies for Tirzepatide Reconstitution

Required

✓ Tirzepatide vial (lyophilized powder)
✓ Bacteriostatic water (with 0.9% benzyl alcohol)
✓ Insulin syringes (U-100, 0.5mL or 1mL)
✓ Alcohol swabs

How to Reconstitute Tirzepatide: Step-by-Step

Clean Both Vial Tops

Wash hands thoroughly. Wipe the rubber stoppers of both the tirzepatide vial and BAC water vial with alcohol swabs. Let dry completely (~15 seconds).

Draw the BAC Water

Using a syringe, draw your calculated amount of BAC water. For a 30mg vial, 3mL is recommended (gives 10mg/mL concentration).

⚠️ Inject SLOWLY Down the Vial Wall

Critical: Angle the needle so it touches the inside glass wall. Inject BAC water very slowly, letting it trickle down, never spray directly onto the powder. This protects the peptide structure.

Gently Swirl Until Dissolved

Never shake. Gently swirl the vial in a circular motion. The powder should dissolve within 1-5 minutes, resulting in a clear solution.

If cloudiness persists after 10 minutes of gentle swirling, contact your supplier. Don't use.

Label and Refrigerate

Write the date, concentration (e.g., "10mg/mL"), and a discard date (28-60 days) on the vial. Store immediately in the refrigerator at 36-46°F (2-8°C).

Video Tutorial

Watch this step-by-step demonstration of peptide reconstitution and injection technique by Dr. Jason Emer:

Video covers: supplies needed, sterile technique, BAC water injection, mixing, and subcutaneous injection demonstration.

Tirzepatide Storage After Reconstitution

✓ Proper Storage

• Refrigerate at 36-46°F (2-8°C)
• Keep away from light
• Use within 28-60 days
• Inspect before each use
• Swab stopper each time

✗ Avoid

• Never freeze reconstituted tirzepatide
• Don't leave at room temp
• Don't use if cloudy/particles
• Don't use past expiration
• Never share needles

Common Tirzepatide Reconstitution Mistakes

❌ Injecting water directly onto powder

High-pressure streams can damage the peptide. Always aim for the vial wall.

❌ Shaking the vial vigorously

Creates foam and degrades the peptide. Gentle swirling only.

❌ Using sterile water without preservative

BAC water's benzyl alcohol prevents bacteria. Sterile water is for single-use only.

❌ Miscalculating insulin units

Wrong concentration assumptions lead to incorrect doses. Use our calculator to double-check.

Calculate Your Tirzepatide Dose

Get exact insulin units for any vial size and concentration.

Reconstitution Plotter

Medical Disclaimer

This guide is for educational purposes only and does not constitute medical advice. Compounded tirzepatide is not FDA-approved and may vary in quality. Always consult a qualified healthcare provider before using any medication. Self-administration of injectable medications carries risks including infection, incorrect dosing, and adverse reactions.

Tirzepatide Complete Guide

Everything about Mounjaro and Zepbound.

Tirzepatide Dosing Guide

Titration from 2.5mg to 15mg weekly.

Retatrutide Reconstitution Guide

How to reconstitute compounded retatrutide.

Microdosing Tirzepatide

Split-dosing for better tolerability.

Reconstitution Calculator

Calculate concentrations and insulin units.

Retatrutide vs Tirzepatide

Compare triple vs dual agonist.

Frequently Asked Questions

How much BAC water for 30mg tirzepatide?

For a 30mg tirzepatide vial, 3mL of bacteriostatic water is recommended. This creates a 10mg/mL concentration, making dosing math simple: 2.5mg = 25 IU, 5mg = 50 IU, 7.5mg = 75 IU, 10mg = 100 IU. Use our reconstitution calculator for other concentrations.

How much BAC water for 60mg tirzepatide?

For a 60mg tirzepatide vial, 6mL of bacteriostatic water gives the same easy 10mg/mL concentration as the popular 30mg setup: 5mg = 50 IU, 7.5mg = 75 IU, 10mg = 100 IU. If you want a smaller injection volume, 3mL makes a concentrated 20mg/mL (5mg = 25 IU, 10mg = 50 IU). Either works; pick the one whose dosing math you find easiest.

How do you reconstitute 60mg tirzepatide?

Reconstituting a 60mg vial follows the same steps as any other size. Swab both stoppers, draw 6mL of BAC water (for 10mg/mL) or 3mL (for 20mg/mL), inject it slowly down the inside glass wall so it never sprays the powder, then swirl gently until clear. Label the vial with the date and concentration and refrigerate at 36-46°F (2-8°C). A 60mg vial at 10mg/mL holds twelve 5mg doses.

How long does reconstituted tirzepatide last?

Reconstituted tirzepatide is stable for 28-60 days when refrigerated at 36-46°F (2-8°C). The conservative recommendation is 28 days. Always label the vial with the reconstitution date and discard if the solution becomes cloudy or develops particles.

Is compounded tirzepatide the same as Mounjaro?

Compounded tirzepatide contains the same active molecule as Mounjaro and Zepbound. However, compounded versions are not FDA-approved and may vary in purity, concentration, and quality depending on the compounding pharmacy. Brand-name Mounjaro/Zepbound come in pre-filled pens that don't require reconstitution.

What insulin units for 5mg tirzepatide?

The insulin units for a 5mg dose depends on your concentration. At 10mg/mL (30mg vial + 3mL BAC), 5mg = 50 IU. At 5mg/mL (10mg vial + 2mL BAC), 5mg = 100 IU. Formula: (Dose mg ÷ Concentration mg/mL) × 100 = IU. Our calculator does this automatically.

Can I freeze reconstituted tirzepatide?

No, never freeze reconstituted tirzepatide. Freezing damages the peptide structure and reduces potency. Unreconstituted (powder) tirzepatide can be frozen for long-term storage, but once mixed with BAC water, store only in the refrigerator.

Why use bacteriostatic water instead of sterile water?

Bacteriostatic water contains 0.9% benzyl alcohol, which inhibits bacterial growth. This allows safe use over multiple doses from the same vial. Sterile water has no preservative, so bacteria can contaminate multi-dose vials within hours, creating serious infection risk.

What is the difference between compounded and brand-name tirzepatide?

Brand-name tirzepatide (Mounjaro, Zepbound) comes in pre-filled injection pens at fixed doses. Compounded tirzepatide comes as lyophilized powder in vials that require reconstitution with BAC water before injection. The active ingredient is the same, but compounded versions allow flexible dosing and typically cost less.