Peptide calculator
Vial size, water, dose. Get the units to draw on an insulin syringe, with the math shown.
Dosage charts
Ranges with sources, units at a standard mix.
- BPC-157250 mcg to 500 mcg / dose, 1 to 2 times daily
- TB-5002 mg to 2.5 mg / dose, 2 to 3 times weekly (loading)
- Semaglutide0.25 mg to 2.4 mg / week
- Tirzepatide2.5 mg to 15 mg / week
- Retatrutide1 mg to 12 mg / week
- Cagrilintide0.3 mg to 4.5 mg / week
- Ipamorelin200 mcg to 300 mcg / dose, 1 to 2 times daily
- CJC-1295 (no DAC)100 mcg to 200 mcg / dose, 1 to 3 times daily
- GHK-Cu1 mg to 2 mg / day
- Tesamorelin1.28 mg / day
- PT-1411.75 mg / dose
- MOTS-c0.5 mg/kg to 5 mg/kg / day, intraperitoneal
How the math works
mg in vial ÷ mL water = mg/mL
dose ÷ mg/mL = mL
mL × 100 = units (U-100)
5 mg in 2 mL is 2.5 mg/mL. A 250 mcg dose is 0.1 mL, which is 10 units. The vial holds 20 doses. Full detail on the math page.
More calculators
- mL to units
- How much water to add
- Doses per vial
- Cost per mg
- Blend calculator
- Unit conversions
- Vial and water tables
- Calculator by peptide
Guides
- Insulin syringe units explained
- How much bacteriostatic water to add
- mcg vs mg
- Seven reconstitution mistakes
- How many doses are in a vial
- All guides
Where to get it. We do not sell anything. Licensed Peptides carries vials and bacteriostatic water with a third-party certificate of analysis per lot: catalog. Plain link, no referral code.
Common questions
How do I calculate my peptide dose in units?
Divide the mg in the vial by the mL of water to get mg/mL. Divide your dose by that concentration to get mL. Multiply by 100 for units on a U-100 insulin syringe. 5 mg in 2 mL is 2.5 mg/mL, so 250 mcg is 0.1 mL, which is 10 units.
How many units is 250 mcg?
It depends on how you mixed the vial. With 5 mg in 2 mL, 250 mcg is 10 units. With 5 mg in 1 mL it is 5 units. With 10 mg in 2 mL it is 5 units. The calculator above does this for any combination.
How much water do I add to a peptide vial?
Any amount the vial holds; it changes the concentration, not how much peptide you have. 2 mL in a 5 mg vial makes the math easy: every 100 mcg is 4 units. See the water calculator for a volume that puts your dose on a round number.
Where do the dosage ranges come from?
Each dosage page says. For semaglutide and tirzepatide it is the FDA label. For retatrutide and cagrilintide it is the published trials. For peptides with no human trials, like BPC-157 or TB-500, it is the ranges people commonly report, labeled as such.