Reconstitution calculator
Pick the draw you want each dose to be — a round, easy-to-read number of units — and PepExact tells you exactly how much water to add to the vial.
Add
2 mL of water
and each 250 mcg dose lands on 10 units.
Resulting concentration
2.5 mg/mL
2,500 mcg/mL
Doses in this vial
20
Show the math
- 1. Volume you want one dose to be: 10 units ÷ 100 units/mL = 0.1 mL
- 2. Concentration that makes it work: 250 mcg ÷ 0.1 mL = 2,500 mcg/mL (2.5 mg/mL)
- 3. Water to add: 5,000 mcg ÷ 2,500 mcg/mL = 2 mL
- 4. Doses in the vial: 5,000 mcg ÷ 250 mcg = 20 full doses
Other round-number options
| Draw per dose | Water to add |
|---|---|
| 5 units | 1 mL |
| 10 units | 2 mL |
| 20 units | 4 mL |
| 25 units | 5 mL |
| 50 units | 10 mL |
Why the water volume matters
The amount of water you add doesn't change how much peptide is in the vial — it changes the concentration, and therefore how big or small each draw is on the syringe. More water means larger, easier draws; less water means smaller ones and stretches a small syringe further.
A draw that lands exactly on a syringe marking (10 units, 20 units) is easier to read consistently than one that falls between marks. This calculator works backwards from that goal: choose the units you want, and it computes the water volume that makes the arithmetic come out clean.
PepExact is a measurement tool, not medical advice. It calculates volumes and concentrations from numbers you provide — it never suggests a dose.