Calculator
Vial supply calculator
Enter your vial amount, your dose, and how many times a week you dose. Get back how many doses the vial holds and roughly how many days that covers.
Vial supply calculator
Doses in the vial
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Days of supply
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General dose math only — not medical advice. Intended solely for substances you lawfully possess. Results reflect the values you entered; always confirm dosing with a qualified professional.
Published by Peptade · Calculator · Updated September 2026
Once you know your dose, this calculator answers two follow-up questions: how many of that exact dose does one vial contain, and, at the frequency you tell it, roughly how many days will that supply last. Both numbers come from the same division — vial amount ÷ dose — carried one step further.
It's a planning tool for a dose and a schedule you've already set, not a way to arrive at either one. Change your dose or your frequency and the supply estimate updates; the calculator never proposes a number of its own.
If you are considering using any injectable peptide, you must consult with a licensed physician or qualified healthcare provider before purchasing, reconstituting, or administering any injectable product. This applies regardless of whether a prescription is required in your jurisdiction. Injectable peptides carry additional risks including but not limited to infection, allergic reaction, nerve damage, and adverse events from improper reconstitution, contaminated supplies, incorrect technique, or dosing errors.
Never do this math twice.
Peptade keeps the numbers you enter for each compound, so its reconstitution tool fills them in for you next time — from your own entries, never from a catalog.
- Saved per compound
- Schedules, cycles and titrations
- Supply that counts down
How it works
Step 1
Enter your vial and dose
Type the total amount in the vial and the dose you take each time, in mg or mcg.
Step 2
Enter your weekly frequency
Type how many times a week you dose, based on the schedule you've already set.
Step 3
Read the supply estimate
See how many doses the vial holds and an estimated number of days that supply covers.
Worked example
- 6 mg vial ÷ 0.3 mg (300 mcg) dose = 20 doses
- 20 doses ÷ 2 doses per week × 7 = 70 days of supply
Arithmetic on the numbers above, for the dose and schedule you already chose.
Arithmetic example only — not a suggested dose.
Frequently asked questions
No. It's a straight-line estimate from the doses per compound and your stated weekly frequency — it assumes every dose happens on schedule.
You can use the day count as a rough planning figure for that, but it's arithmetic on what you entered, not a supply-chain or reminder feature.
Re-enter the new dose and remaining vial amount to get an updated figure — the calculator only works from what's currently typed in.
More free calculators
- CalculatorReconstitution calculatorConvert your vial amount, water and dose into concentration, syringe units and doses per compound — a free unit converter with no drug database or defaults.
- CalculatorBacteriostatic water calculatorWork out how much bacteriostatic water puts your chosen dose at a chosen syringe mark. Enter your vial, dose and target units — no defaults, no drug list.
- Vial trackerPeptide Vial Tracker: Supply & ReconstitutionTrack a vial's supply and reconstitution date, with a live countdown calculated from the doses you log.
- Half-lifePeptide half-life calculatorEnter a half-life, a dosing interval and a number of doses to see an estimated curve over time — a textbook model, not a personalized prediction.
The calculators are general-purpose arithmetic on the values you enter, intended solely for substances you lawfully possess. Entering a value is not Peptade’s endorsement or verification of any substance or dose. See the Medical Disclaimer.