Reconstitution calculator
Enter what is in the vial, how much liquid is added, and the amount you want to measure. The calculator shows the concentration, the volume in mL and where that falls on an insulin syringe.
This tool does arithmetic only. It does not tell you what amount is appropriate for anyone. For the amounts used in published human studies, see each compound's page in the library. Nothing here is medical advice.
How the math works
- Concentration = amount in vial / liquid added. 10 mg in 2 mL is 5 mg/mL, which is 5,000 mcg/mL.
- Volume = amount wanted / concentration. 250 mcg / 5,000 mcg per mL = 0.05 mL.
- Syringe units = volume x 100 on a U-100 insulin syringe, because 100 units equal 1 mL there 2. 0.05 mL is 5 units.
Units are mixed up with milligrams more often than anything else. On a U-100 insulin syringe a "unit" is a volume mark (0.01 mL), not an amount of peptide. How much peptide one unit holds depends entirely on how much liquid went into the vial. Read more in Syringes and units.
Units conversion cheat sheet
| 1 mg | 1 mL | 1 unit (U-100) |
|---|---|---|
| 1,000 mcg | 100 units on a U-100 syringe | 0.01 mL |
IU (international units) are a measure of biological activity set separately for each substance. They cannot be converted to milligrams without that substance's own conversion factor, so use IU for both the vial and the amount when the vial is labeled in IU.