Free research tools
Peptide reconstitution and dosing math, worked out in front of you
Enter the vial size, the water volume and the amount you want to measure; the calculator returns the concentration and the reading on a U-100 syringe, with the formula beside the result. 52 compounds, six languages, and it never recommends a dose. Research use only.
Pre-fills example values. Every field remains editable.
The amount printed on the vial or listed on a product page.
Liquid volume used for the concentration calculation.
The mass amount to convert into liquid volume for this math example.
Your result
Syringe-unit reading
10 units
= 0.1 mL · 250 mcg target amount
Concentration
2.5mg/mL
Per insulin unit
25mcg
Portions per vial
20
Volume
0.1mL
This calculator is an educational tool for laboratory and research math only. The peptides referenced are research compounds not intended for human or veterinary use, and example values are not medical advice or personal-use instructions. Follow applicable research protocols and regulations.
How the calculator works
Concentration
peptide ÷ liquid
Total peptide divided by liquid volume gives the concentration per mL.
Volume
target ÷ concentration
The target mass divided by concentration gives the liquid volume.
Syringe units
volume × 100
For insulin units, 100 units equals 1 mL, so mL is multiplied by 100.
What the calculations assume
The diluent the arithmetic is written for, the guide library behind the compound pages, and the quickest way to a compound guide. Everything here is sold on medibact.com; this site sells nothing.
Bacteriostatic Water
USP-grade, 0.9% benzyl alcohol, 30 mL multi-dose vial. Research use only.
$30.99
Buy at Medibact
TM Bacteriostatic Water
The same USP specification in the TM listing, 30 mL multi-dose vial.
$25.00
Buy at Medibact
Peptide Guide Library — All-Access Lifetime
Every compound guide in the library, plus the Stacking and Blood Marker guides, for life.
$99.00
Buy at MedibactFind your compound guide
55 compound guides at Medibact: mechanism, reported ranges, reconstitution math and the named stacks.
Why the water matters
Every concentration on this site is a vial’s labelled milligrams divided by a volume of diluent. Medibact supplies that diluent as Bacteriostatic Water for Injection, USP — sterile water with 0.9% benzyl alcohol in a 30 mL multi-dose vial, produced in an FDA-registered U.S. facility. The preservative is what lets a vial be entered more than once, which is why the arithmetic on these pages assumes it.
The four sections
Dosage
Per-compound dosage calculators and dosage references that report what labels and trials state, with the source on every figure.
Reconstitution
The calculator, the cross-compound chart, the worked examples and the terminology guide — vial to syringe reading.
Stacks
The Stacking Guide in full, the named blends, and one stacking page per compound: what is reported, what is redundant, what to avoid.
How-to
The arithmetic of handling — a dose to syringe units, reading a syringe for an amount, blend math and stack sheets — plus the tracker and the blend calculator.
Storing peptides and the mixing procedure itself are on Medibact: How to store peptides · How to reconstitute peptides.
52 compound calculators · 45 per-compound stacking pages · the Peptide Stacking Guide in full.
Latest
50 articles
Pillar E — stacks
Peptide Stack for Weight Loss: CagriSema, AOD-9604, MOTS-c
The combinations sold for weight loss, for women too: what the CagriSema trials report, what AOD-9604, MOTS-c and 5-Amino-1MQ lack, and the units per draw.
Pillar E — stacks
Sermorelin and Ipamorelin Stack: Evidence, Doses and Units
What sermorelin and ipamorelin are, who promotes the pairing, the zero trials of the combination, each component's reported doses, and the units per draw.
Pillar E — stacks
Selank and Semax Stack: Russian Labels, Evidence and Units
What Selank and Semax are, the Russian nasal-drop instructions that hold the only label doses, the trial record, circulating figures, and the units per draw.
Pillar E — stacks
Peptide Stack for Muscle Growth: Evidence, Doses and Units
The four combinations sold for muscle growth: who claims what, how many human trials exist for each component, the reported doses, and the units per draw.
Pillar E — stacks
Cagrilintide and GLP-1 Stack: CagriSema, Tirzepatide, Units
Cagrilintide with semaglutide as the REDEFINE trials report it, the tirzepatide pairing as trials use it (head to head, not combined), and the units.
Pillar C — reconstitution by compound
Tirzepatide Reconstitution: Water, mg/mL and Units per Vial
Water volume, concentration and U-100 syringe units for 5, 10, 15, 20, 30 and 60 mg tirzepatide vials, with the label and trial figures as the sources.
Frequently asked questions
What does reconstituting a peptide mean?
Research peptides are supplied as a freeze-dried (lyophilized) powder. Reconstitution is dissolving that powder in a measured volume of liquid, usually bacteriostatic water, so the vial becomes a solution with a known concentration. The concentration is what makes a syringe reading meaningful.
How is the concentration worked out?
Vial amount divided by the volume of water added. A 5 mg vial with 2 mL of bacteriostatic water is 2.5 mg/mL. Every calculator on this site runs that one division, then converts an amount you enter into a volume (amount ÷ concentration) and into syringe units (volume × 100 on a U-100 syringe).
How many units is 1 mL on an insulin syringe?
On a U-100 insulin syringe, 1 mL is 100 units and one unit is 0.01 mL. The syringe measures liquid volume, not peptide, so the same 10-unit mark holds a different amount of peptide depending on how much water went into the vial.
Why bacteriostatic water rather than plain sterile water?
Bacteriostatic water is sterile water preserved with 0.9% benzyl alcohol. The preservative is what allows a multi-dose vial to be entered more than once; plain sterile water has no preservative and is intended for single use. The calculators work with any diluent volume — the choice of liquid is set by the protocol being followed.
Do the calculators recommend a dose?
No. They report concentration and syringe units from the figures you type in — vial size, water volume and the amount you choose. No preset on this site is a suggested amount, and nothing here is medical advice or an instruction to use any substance. Research use only.
Which compounds have their own calculator?
52 compounds, each with a page pre-set to its common vial sizes, a concentration table and a syringe-unit chart, in English, German, French, Dutch, Spanish and Ukrainian. The full list is on the calculator page.
Educational use only — not medical advice. This page summarizes information reported in published research and community practice for educational purposes. It is not medical advice and not a recommendation to use any compound. Any doses, schedules, or combinations shown are examples of what has been reported, not instructions for you. Many peptides described here are research compounds that are not FDA-approved for the uses discussed and may be investigational or restricted. Effects, risks, and legal status vary; individual needs and results vary. Consult a qualified, licensed healthcare professional before making any decision. Do not use this content to diagnose, treat, or dose yourself.