Peptide Reconstitution Calculator.
Vial size + BAC water + target → exact syringe units.
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.
How it works.
Enter your vial and water
Pick the peptide amount in the vial (mg) and how much bacteriostatic water you're adding (mL). That fixes the concentration: mcg per mL and mcg per U-100 syringe unit.
Enter your own target amount
Type the amount you want per draw in mcg or mg. The tool converts it to syringe units and volume, and it never suggests or defaults an amount for you.
Read the units and check the math
You get units to draw, mL, draws per vial, and mg left. Open 'Show the math' to see every step, and compare water volumes to see how dilution changes the reading.
FAQ.
Does this tell me how much to take?
No. It only converts an amount you enter into syringe units and volume. It never suggests, defaults, or recommends an amount. That's a conversation for a licensed provider.
What's a U-100 unit?
A standard insulin syringe is marked in U-100 units, where 100 units = 1 mL. The calculator uses that scale to turn your target amount into a mark on the syringe.
Why does more water mean more units?
Adding more water lowers the concentration (fewer mcg per unit), so the same target amount spans more units on the syringe. The 'compare volumes' table shows this directly.
PepCue turns these numbers into a private schedule with reminders, vial math, and a provider-ready record. Free.