Reconstitution calculator

Get the exact number of units to draw

Reconstitution is just dilution math — but a small mistake turns a precise dose into a guess. Enter your vial, your water, and your target dose. We’ll do the rest.

Pulls a common vial size and typical dose — you can edit anything after.
The total milligrams of peptide, printed on the vial.
How much water you draw into the vial to reconstitute it.
Standard insulin syringes are U-100: 100 units = 1 mL.
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Enter your vial size, water, and dose to see your draw.

Safety first. This tool is a math aid for educational purposes only — not dosing advice. It cannot verify product purity, sterility, or whether any compound is appropriate for you. Always work with a licensed medical professional.

How reconstitution works

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Concentration

Peptide (mg) ÷ water (mL) = how many mg sit in each mL. More water = weaker concentration = larger volume per dose.

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Volume to draw

Target dose ÷ concentration = the mL you draw. Multiply by 100 to get insulin-syringe units.

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Readability

Aim for a draw that lands on easy-to-read tick marks. If units are tiny, add less water next time.