For Research Purposes Only

Free research tool

Peptide reconstitution calculator

Clicks per dose, doses per pen, days of supply and cost per dose for pre-loaded pens — or concentration and syringe units if you are reconstituting a vial. Enter your own numbers; the calculator does the arithmetic and never recommends a dose.

Your numbers

Pick a pen to load its published specs, or enter your own.

mg
mg
mg
weeks
Total content and per-click volume are both published on the Retatrutide Pen (GIP, GLP-1 & Glucagon) product page.

Result

Clicks per dose6.02 clicksNot a whole number of clicks.
Doses per pen40
Days of supply40 d
Concentration0.166 mg / click
Cost per doseAED 36.25
6.02 clicks isn't dialable. The nearest dialable doses are 6 clicks = 0.996 mg, or 7 clicks = 1.162 mg.
Quantity

3 pens for 12 weeks

One pen covers 40 days at this dose, so a 12-week run needs 3.

View Retatrutide Pen (GIP, GLP-1 & Glucagon) →AED 36.25 per dose
Reorder

This pen runs out around 28 Nov 2026

Shipping takes 2–4 business days — worth ordering before a run is interrupted.

A calculation tool only — it converts the values you enter and does not recommend a dose, frequency or protocol. Research and laboratory use only.

How reconstitution maths works

Lyophilised peptides are supplied as a dry powder measured in milligrams. Adding bacteriostatic water sets the concentration: concentration (mcg/ml) = peptide (mg) × 1000 ÷ water (ml). The volume you draw for a given dose is then dose (mcg) ÷ concentration (mcg/ml). On a U-100 insulin syringe, multiply the ml figure by 100 to get units.

Example: a 10 mg vial reconstituted with 2 ml gives 5,000 mcg/ml. A 250 mcg research dose is 0.05 ml — 5 units on a U-100 syringe.

For published stability data on storage after reconstitution, see our peptide storage and stability research guide.

Skip the maths with pre-mixed pens

RegenMed pens come pre-mixed at verified concentrations with dial-dose measurement — third-party tested, for laboratory research use.

Frequently asked questions

How do I use a peptide calculator?

How much bacteriostatic water should be added to a peptide vial?

What do insulin syringe units mean?

How are pre-mixed pens different?

Related reading

All products sold by RegenMed are supplied strictly for laboratory research purposes only and are not for human consumption. Nothing on this page is medical advice, and no statement has been evaluated by the MHRA or FDA. Content summarising published research is provided for educational purposes.