Compound calculator
Retatrutide Calculator
Use this retatrutide calculator—also called a reta calculator—to convert vial mass, reconstitution volume, and a target amount into concentration, liquid volume, and U-100 syringe units.
For laboratory research onlyYour calculation
ReadyU-100 syringe marking
—units
— mL / — µL
Schematic only. Check the graduations on your device.
- Concentration
- — mg/mL
- Full samples per vial
- —
— mg in each — mL sample
Starting values are examples, not recommended amounts. Results are rounded for display; sample counts exclude handling losses.
How it works
Retatrutide reconstitution calculator
Enter the total retatrutide mass printed on the vial and the final liquid volume after reconstitution. The calculator divides mass by volume to find the concentration, then converts the target amount into milliliters, microliters, and U-100 syringe units.
A retatrutide dosage calculator cannot determine an appropriate amount. This page only converts the amount entered by the researcher; it does not select a protocol.
For the mixing steps and the water for each vial size, see how to reconstitute retatrutide.
Find the concentration
Retatrutide in vial (mg) ÷ final volume (mL)
Enter your values above.
Convert amount to volume
Target amount (mg) ÷ concentration (mg/mL)
Enter your values above.
Read the U-100 equivalent
Sample volume (mL) × 100 = U-100 units
Enter your values above.
2 mL reference table
Retatrutide units calculator
These examples assume a 2 mL final volume. Change the reconstitution volume in the calculator above for a different concentration.
| Vial | 0.5 mg target | 1 mg target | 2 mg target | 4 mg target |
|---|---|---|---|---|
| 10 mg | 10 | 20 | 40 | 80 |
| 20 mg | 5 | 10 | 20 | 40 |
| 30 mg | 3.33 | 6.67 | 13.33 | 26.67 |
| 60 mg | 1.67 | 3.33 | 6.67 | 13.33 |
Values are U-100 syringe units. 100 units equals 1 mL.
Common questions
Retatrutide calculator questions
How does the retatrutide calculator determine U-100 units?
It divides the vial mass by the final solution volume to find mg per mL. It then divides the target amount by that concentration and multiplies the resulting mL by 100. On a U-100 scale, 100 units equals 1 mL.
Does this calculator choose a retatrutide dosage?
No. It converts a researcher-entered target amount into liquid volume and U-100 units. It does not recommend an amount or protocol.
What changes when I select another retatrutide vial size?
With the same final volume, a larger vial mass creates a higher concentration, so the same target amount occupies less liquid and fewer U-100 units.
Can I enter a different retatrutide reconstitution volume?
Yes. Enter the measured final volume in milliliters. Every concentration, volume, and unit result updates from that value.