Result
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⚠️Educational Use Only. Not medical advice. Consult a qualified healthcare professional.
mg
Enter a valid vial size.
mcg
Your target dose in micrograms per injection.
Enter a valid dose.
Choose your preferred syringe draw amount per dose.
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The Optimization Strategy
This calculator works backwards: you choose how many IU you want to draw per dose, and it calculates the exact BAC water volume to make that happen.
Step 1 — Needed Concentration
Concentration = Dose (mcg) ÷ (Preferred IU × 0.01 ml)Step 2 — BAC Water Volume
BAC Water (ml) = (Vial mg × 1000) ÷ Needed ConcentrationWhy Draw Volume Matters
| Draw Volume | Readability | Best For |
|---|---|---|
| 5–10 IU | Hard to read precisely | High-concentration setups |
| 20 IU | ✓ Ideal | Most research protocols |
| 25 IU | ✓ Easy quarter-mark | Convenient measurement |
| 50 IU | Clear half-mark | Larger doses or dilute solutions |
Frequently Asked Questions
BAC water is sterile water with 0.9% benzyl alcohol as a preservative. The benzyl alcohol inhibits bacterial growth, allowing the reconstituted vial to be accessed multiple times safely. It is the standard solvent in peptide research settings.
No. The total peptide in the vial is fixed. The BAC water volume only changes the concentration and therefore the draw volume per dose. The actual peptide amount per injection stays the same as long as you use the correct volume from the dosage calculator.
20 IU (0.20 ml) falls on a clearly marked line of most U-100 syringes, reducing measurement error. It is also large enough to draw accurately without being too large to track dose counts carefully. 25 IU is also popular as it aligns with the quarter-way mark.