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Retatrutide Dosage Calculator

Calculate exact retatrutide injection volumes for any dose. Uses standard reconstitution formulas — pre-filled for a 10mg vial.

Dose Reference Table

Pre-calculated for a 10mg vial + 2ml BAC water = 5,000 mcg/ml concentration. Using a 100-unit (1ml) insulin syringe.

Dose Inject Volume (ml) Syringe Units
1000mcg (1mg) 0.200 ml 20 units
2000mcg (2mg) 0.400 ml 40 units
2500mcg (2.5mg) 0.500 ml 50 units
3000mcg (3mg) 0.600 ml 60 units
4000mcg (4mg) 0.800 ml 80 units
5000mcg (5mg) 1.000 ml 100 units

About Retatrutide

Retatrutide (also called "reta") is a next-generation triple agonist peptide under clinical investigation. It targets three key receptors: GLP-1 (glucagon-like peptide-1), GIP (glucose-dependent insulinotropic polypeptide), and glucagon receptors. This triple mechanism is theorized to provide superior metabolic effects compared to dual or single agonists.

For research purposes, retatrutide is typically reconstituted from a lyophilized powder. The most common vial sizes are 5mg, 10mg, and 20mg. When using 2ml of bacteriostatic water per 10mg vial, the resulting concentration is 5,000 mcg/ml — making dosing calculations straightforward.

The half-life of retatrutide is approximately 6 days, which supports once-weekly administration in research protocols. Always consult a qualified healthcare professional before using any research peptide.

Frequently Asked Questions

In clinical trials, retatrutide doses have ranged from 1mg to 12mg per week with gradual escalation. Common starting doses in research are 1–2mg per week, escalating based on tolerability.
The standard is 2ml of bacteriostatic water per 10mg vial, giving 5,000 mcg/ml concentration. Adjust proportionally for other vial sizes.
Divide your dose in mcg by the concentration (mcg/ml), then multiply by 100 to get syringe units. Example: 2000mcg ÷ 5000 mcg/ml × 100 = 40 units.
When stored at 2–8°C and reconstituted with bacteriostatic water, retatrutide typically remains stable for 28–30 days. Keep refrigerated and away from light.
A 29–31 gauge, 8mm needle is commonly used for subcutaneous peptide injections. Standard 100-unit (1ml) insulin syringes are ideal for measuring small volumes accurately.
Retatrutide Reconstitution Full reconstitution guide for retatrutide. Semaglutide Calculator Reconstitution for semaglutide vials. Tirzepatide Calculator Reconstitution for tirzepatide vials. BAC Water Calculator Calculate BAC water amounts.