Peptide Reconstitution Calculator
Enter your vial size, the volume of bacteriostatic water you added and your target dose. The calculator shows the exact units to draw on a U-100 insulin syringe, the resulting concentration and how many doses are in the vial — with a live visual of the syringe and vial.
Your vial
Enter the values printed on the label and your target dose.
Quick presets
Draw on a U-100 insulin syringe
10.0 units= 0.100 mL = 250 mcg
Concentration
2.50 mg/mL
Volume per dose
0.100 mL
Doses per vial
20
How the maths works
A U-100 insulin syringe puts 100 units in 1 mL, so each unit equals 0.01 mL. From there:
- Concentration = vial mg ÷ BAC water mL
- Volume per dose = dose mcg ÷ 1000 ÷ concentration
- Units = volume mL × 100
- Doses per vial = (vial mg × 1000) ÷ dose mcg
Aim for a reconstitution volume that places your typical dose between roughly 10 and 30 units on the syringe — that's where readout precision is best.
Want the full protocol?
The companion guide walks through diluent selection (BAC water vs sterile water vs saline), sterile technique, common mistakes, a full dosing chart and storage windows.