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Reverse Peptide Calculator
Smart reconstitution for a clean syringe draw. Pick the units you want to pull, and this tool calculates how much bacteriostatic water to add.
Reverse Peptide Calculator
Pick your syringe draw first — we calculate how much BAC water to add
1 unit = 0.01 mL on a standard U-100 insulin syringe.
Use this much BAC water
5.00mL
to draw 25 units for a 0.50 mg dose.
Full syringe
Zoomed to your draw
Concentration: 2000 mcg/mL (2.00 mg/mL).
Micrograms ↔ Milligrams
Milliliters ↔ Units
This works backwards from a standard calculator. Instead of entering BAC water and getting a draw amount, you choose a clean draw (like 10, 20, or 50 units) and the tool solves for the BAC water needed.
Need the standard forward calculator? Open reconstitution calculators.
How this calculator works
A standard peptide calculator asks how many syringe units to draw after you enter your BAC water volume. This reverse calculator works the other way around: you choose the draw size you want, and it solves for the BAC water that produces it.
Formula: BAC water (mL) = (vial mg × draw units × 0.01) ÷ dose mg. Example: a 10 mg vial, 500 mcg (0.5 mg) dose, and a 25-unit draw (0.25 mL) needs 5 mL bacteriostatic water.
Looking for storage guidance and the forward calculator? Visit our Reconstituting & Storing Peptides page.
Research Use Only
For laboratory research use only. Not for human or veterinary use.
Not for Human Use
Products are not intended for human or veterinary consumption.
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Rigorous quality control on every batch from our state-of-the-art laboratory.