Tools / Reconstitution calculator

Reconstitution & syringe unit calculator

Math only. This tool never suggests a dose. Use the dose your prescriber or the product label gives you, and have a pharmacist or clinician confirm your math. Unit mix-ups are a known cause of accidental overdose with injectable peptide drugs.

How the math works

Concentration = powder (mg) ÷ diluent (mL).
Volume to draw (mL) = dose (mg) ÷ concentration (mg/mL).
Insulin syringes are marked in units, where 100 units = 1 mL. Units = mL × 100.

Safety notes

Check the unit ladder. 1 mg = 1,000 mcg. A mg-vs-mcg slip is a 1,000-fold error.
Very small draws are imprecise. Below about 5 units a small reading error is a large share of the dose; ask your pharmacist whether to use more diluent.
Follow the beyond-use date on your pharmacy label. Do not extend it.
Products from unregulated "research" sellers are not authorized medicines. See the legal tracker and our guide to certificates of analysis.

Educational only, not medical advice. Runs entirely in your browser; nothing is stored or sent.