Peptide calculator
Turn your vial, your bacteriostatic water and the amount you've been told to measure into exact syringe units. This tool only does the math: it never suggests an amount.
Your vial
Printed on the vial label, e.g. "10 mg."
From your clinician or protocol. Double-check mcg vs mg.
Draw to
—units
Enter the amount you need to measure.
- Concentration
- 5 mg/mL
- Each 1 unit (0.01 mL) contains
- 50 mcg (0.05 mg)
- Each 10 units (0.1 mL) contains
- 500 mcg (0.5 mg)
- Draws of this size per vial
- —
How the math works
1. Concentration
concentration (mg/mL) = peptide in vial (mg) ÷ water added (mL)
2. Volume to draw
volume (mL) = amount needed (mg) ÷ concentration (mg/mL)
3. Units on a U-100 insulin syringe
units = volume (mL) × 100
Example: a 10 mg vial with 2 mL of water is 5 mg/mL. If the amount you need to measure is 1 mg, that's 1 ÷ 5 = 0.2 mL, which is 20 units.
Before you draw
- Convert everything to the same unit. 1 mg = 1,000 mcg.
- "Units" are volume, not amount. How much peptide is in a unit depends on your concentration.
- Only use U-100 insulin syringes with this calculator.
- Write the concentration on the vial label when you reconstitute it.
Educational math tool only, not medical advice. It does not recommend any amount or confirm that any compound is safe or appropriate. Research-use-only products are not approved for human use. Amounts should come from a licensed clinician. Always double-check your math.