Peptide Dosing Cheat Sheet
Reconstitution math on one page · U-100 insulin syringes · PeptideDial.com
Math reference only — not medical advice and not a dose recommendation. Many peptides are not approved for human use. Verify every number against your own vial label and syringe.
The 3 formulas
- Concentration (mcg/mL) = vial mg × 1,000 ÷ water mL
- Volume (mL) = dose mcg ÷ concentration
- Units = volume mL × 100 (U-100 syringe)
Example: 5 mg + 2 mL = 2,500 mcg/mL → 250 mcg = 0.1 mL = 10 units. 1 mg = 1,000 mcg.
Units ↔ mL (U-100)
| 5 u = 0.05 mL | 10 u = 0.1 mL | 20 u = 0.2 mL | 25 u = 0.25 mL |
| 30 u = 0.3 mL | 40 u = 0.4 mL | 50 u = 0.5 mL | 100 u = 1 mL |
Syringe sizes: 0.3 mL = 30 u · 0.5 mL = 50 u · 1 mL = 100 u.
Concentration chart — mcg per unit (and mcg/mL)
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 2 mg | 20 mcg/unit · 2,000 mcg/mL | 10 mcg/unit · 1,000 mcg/mL | 6.7 mcg/unit · 667 mcg/mL |
| 5 mg | 50 mcg/unit · 5,000 mcg/mL | 25 mcg/unit · 2,500 mcg/mL | 16.7 mcg/unit · 1,667 mcg/mL |
| 10 mg | 100 mcg/unit · 10,000 mcg/mL | 50 mcg/unit · 5,000 mcg/mL | 33.3 mcg/unit · 3,333 mcg/mL |
| 15 mg | 150 mcg/unit · 15,000 mcg/mL | 75 mcg/unit · 7,500 mcg/mL | 50 mcg/unit · 5,000 mcg/mL |
| 20 mg | 200 mcg/unit · 20,000 mcg/mL | 100 mcg/unit · 10,000 mcg/mL | 66.7 mcg/unit · 6,667 mcg/mL |
| 30 mg | 300 mcg/unit · 30,000 mcg/mL | 150 mcg/unit · 15,000 mcg/mL | 100 mcg/unit · 10,000 mcg/mL |
Dose → units quick reference
| Dose | 5 mg + 2 mL | 10 mg + 2 mL | 10 mg + 3 mL | 20 mg + 2 mL |
|---|---|---|---|---|
| 100 mcg | 4 u | 2 u | 3 u | 1 u |
| 200 mcg | 8 u | 4 u | 6 u | 2 u |
| 250 mcg | 10 u | 5 u | 7.5 u | 2.5 u |
| 300 mcg | 12 u | 6 u | 9 u | 3 u |
| 500 mcg | 20 u | 10 u | 15 u | 5 u |
| 1 mg | 40 u | 20 u | 30 u | 10 u |
| 2 mg | 80 u | 40 u | 60 u | 20 u |
| 2.5 mg | 100 u | 50 u | 75 u | 25 u |
| 5 mg | — | 100 u | — | 50 u |
"—" = more than 1 mL or under 1 unit at that mix.
Common vial sizes
| Compound | Usually sold as | Status |
|---|---|---|
| Retatrutide | 5 mg · 10 mg · 15 mg · 20 mg · 30 mg | Investigational drug |
| Tirzepatide | 5 mg · 10 mg · 15 mg · 20 mg · 30 mg · 60 mg | FDA-approved drug |
| Semaglutide | 2 mg · 3 mg · 5 mg · 10 mg | FDA-approved drug |
| BPC-157 | 5 mg · 10 mg | Not approved for human use |
| TB-500 | 2 mg · 5 mg · 10 mg | Not approved for human use |
| Tesamorelin | 2 mg · 5 mg · 10 mg | FDA-approved drug |
| Ipamorelin | 2 mg · 5 mg · 10 mg | Not approved for human use |
| CJC-1295 | 2 mg · 5 mg | Not approved for human use |
| GHK-Cu | 50 mg · 100 mg | Not approved for human use |
| MOTS-c | 5 mg · 10 mg · 40 mg | Not approved for human use |
| Sermorelin | 2 mg · 5 mg · 10 mg | Not approved for human use |
| PT-141 | 10 mg | FDA-approved drug |
| Kisspeptin | 5 mg · 10 mg | Not approved for human use |
Before every draw
- Confirm vial mg on the label
- Confirm how much water you added
- Check the dose unit: mcg vs mg
- Check the syringe says U-100
- Wipe the stopper with an alcohol pad
- Label the vial with date + concentration
Generated by PeptideDial.com · reviewed 2026-10-10 · For exact numbers use the free calculator at peptidedial.com.