About this site
Last updated
This site is a free calculator for peptide reconstitution math. You enter the amount in the vial, the water you add and the dose you want, and it tells you how many units to draw on an insulin syringe. It shows every step of the math, so you can check the answer yourself.
What the site does
- Calculators. The peptide calculator turns a vial amount, water volume and dose into syringe units. The units to mcg calculator works backwards from the units you drew. Two converters handle syringe units and mL and mg and mcg.
- Charts. The reconstitution charts list the units to draw for common vial sizes and water volumes.
- Plain answers. The FAQ and glossary explain the terms and the math in plain English.
What the site does not do
The calculators do math only, and the site doesn’t sell anything. Peptide pages show doses only where an official label or a published clinical trial gives one, with the source and a disclaimer; we never make up or personalize doses. It is not medical advice. Before you use any substance, talk with a qualified healthcare professional. Read the full disclaimer.
How the numbers are checked
The calculators and charts all use one calculation module. Automated tests check it against hand-worked answers and against the same math done a second way. The tests run every time the site is published, and a failing test stops the update from going live. Read more in our editorial policy.
Who runs it
A small editorial team writes and checks every page. To report a mistake or ask a question, use the contact page.