Peptide reconstitution calculator.
Turn vial size, water, and your own target amount into the exact syringe units and volume to draw — in one screen.
- ✓Converts vial mg + BAC water + your target into syringe units
- ✓Compare water volumes side by side to see concentration change
- ✓Free, no signup — email yourself the setup to reference later
Each unit on a 100u · 1.0 mL syringe ≈ 25 mcg of this solution.
Show the math
More water → lower concentration → more units for the same amount.
Get the vial, water, target, and 10-unit draw sent to your inbox so it's easy to reference — and follow when the evidence changes. Free, no account.
Worked example: 250 mcg from a 10 mg vial
- 10 mg × 1000 = 10,000 mcg in the vial.
- Add 2 mL water → 2 × 100 = 200 units of liquid. 10,000 ÷ 200 = 50 mcg per unit.
- 250 mcg ÷ 50 mcg/unit = 5 units (0.05 mL). The vial holds 40 such draws.
mg vs. mcg vs. IU vs. units
Calculator FAQ
Is the calculator free?
Yes — completely free, no account needed. You can optionally email yourself a setup to reference later.
How do I convert mg to syringe units?
The tool converts the peptide weight in your vial into a concentration (mcg per insulin unit) from the water you add, then divides your target amount by that concentration. The full step-by-step is in the calculator's “show the math.”
What's the difference between mg, mcg, IU, and units?
mg and mcg are weight (1 mg = 1,000 mcg). IU is biological activity and does not convert to weight without a known ratio. A syringe “unit” is volume — on a U-100 syringe, 100 units = 1 mL.
Which syringe sizes are supported?
0.3 mL (30 units), 0.5 mL (50 units), and 1.0 mL (100 units).
How much bacteriostatic water should I add?
That's your choice and it changes concentration, not total peptide. Use the compare-volumes table to see how 1, 2, 3, and 5 mL change the units for the same amount.
Does this give medical or dosing advice?
No. It only does arithmetic on values you enter. It never suggests an amount, protocol, or whether anything is safe or advisable. It is not medical advice.