Peptide calculator
One calculator handles every peptide, because the arithmetic never changes — only the numbers you put into it.
Open the dosage calculatorThe three equations
- 1Concentration = vial strength (mg) ÷ bacteriostatic water added (mL)
- 2Injection volume = target dose (mg) ÷ concentration (mg/mL)
- 3U-100 units = injection volume (mL) × 100
Common concentrations at a glance
| Vial | Water | mg/mL | Units per 1 mg |
|---|---|---|---|
| 10 mg | 1 mL | 10 | 10 |
| 10 mg | 2 mL | 5 | 20 |
| 20 mg | 2 mL | 10 | 10 |
| 30 mg | 3 mL | 10 | 10 |
| 30 mg | 5 mL | 6 | 16.7 |
Keeping every vial at 10 mg/mL means one conversion to remember across your whole shelf: 1 mg = 10 units.
Frequently asked questions
Does the calculator work for any peptide?
Yes. Concentration maths is identical regardless of the compound — only the strengths and target doses differ.
What if my vial strength is not listed?
Divide the milligrams by the millilitres of water you added; that number is your mg/mL. The calculator does it for you.
Still have a question?
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Continue reading
Retatrutide dosage calculator
Enter your vial strength and the amount of bacteriostatic water you added, and the calculator returns concentration, injection volume, syringe units, and how many doses remain in the vial.
Insulin syringe guide
Almost every dosing error in peptide research traces back to the syringe: units confused with millilitres, or a barrel too large to read a small dose.
How to mix Retatrutide
Reconstitution is the step where most peptide is wasted. This is the exact procedure for a 30 mg Retatrutide vial, including the arithmetic that turns milligrams into syringe units.
All Origen products are supplied for laboratory research use only and are not for human or veterinary consumption. Nothing on this page is medical advice. Last updated 2026-08-03.