Not medical advice: This page does the arithmetic on numbers you enter. It does not tell you how much of any peptide to take. For that, talk to a qualified clinician.
Fill in the boxes. The numbers update as you type.
mg
weeks
Doses per vial
One vial lasts
Total doses
Total peptide
Vials needed
How the math works
- Doses per vial: the mcg in the vial divided by your dose in mcg, rounded down to whole doses.
- Days one vial lasts: doses per vial divided by doses a week, times 7.
- Total for the plan: doses a week times weeks gives total doses. Total doses times the dose gives total mg.
- Vials needed: total doses divided by doses per vial, rounded up.
Worked examples
Two sample plans, worked by hand.
| Vial | Dose | Schedule | Doses per vial | One vial lasts | Vials needed |
|---|---|---|---|---|---|
| 5 mg | 250 mcg | 7 a week, 8 weeks | 20 | 20 days | 3 |
| 10 mg | 500 mcg | 5 a week, 12 weeks | 20 | 28 days | 3 |
Questions
Why does the calculator mention 28 days?
A vial mixed with bacteriostatic water is usually used within about 28 days. If one vial would last longer than that at your dose, a smaller vial may waste less.
Why round doses per vial down?
A part dose left at the bottom of a vial is not a full dose. Rounding down keeps the vial count honest.
Does bac water change how many doses a vial holds?
No. Water changes how much liquid each dose is, not how many doses the vial holds. Use the reconstitution calculator for the syringe mark.
Can I plan a dose that changes over time?
Yes. The titration schedule calculator adds up a stepped plan week by week.
More calculators
- Reconstitution calculator: Where to draw on the syringe for your dose.
- Peptide cost calculator: Cost per dose, per week and per month from a vial price.
- Titration schedule calculator: A stepped dose schedule with the syringe mark for each step.
