Peptide Supplies Calculator
Once you know how many doses are in a vial, the rest of your shopping list falls out of two numbers: how often you inject and for how long. This calculator turns that into vials, syringes, swabs, and total water for the whole cycle.
The math
Total injections = frequency × protocol length
Vials = total injections ÷ doses per vial (round up)
Syringes = one per injection · Swabs = per-injection count × injections
Vials = total injections ÷ doses per vial (round up)
Syringes = one per injection · Swabs = per-injection count × injections
Worked example
Example
Vial / water / dose5 mg · 2 mL · 250 mcg
Doses per vial20
Frequency × length7×/week · 12 weeks = 84
Vials needed5
Syringes / swabs84 / 168
Bacteriostatic water10 mL
These are theoretical minimums — always order around 10% extra syringes and swabs, and keep a sharps container for disposal.
How to use the calculator
- Enter your vial size, water, and dose (this sets doses per vial).
- Enter how often you inject and your protocol length.
- Adjust swabs per injection if you use a different number.
- Read off the vials, syringes, swabs, and total water you'll need.
Frequently asked questions
How many syringes do I need for a peptide protocol?
One insulin syringe per injection. Multiply how often you inject by how long your protocol runs: injecting once a day for 12 weeks is 84 injections, so 84 syringes — plus a few spares for priming and mistakes.
How many alcohol swabs should I have?
A common practice is two per injection: one to wipe the vial stopper and one for the injection site. So two times the number of injections. The calculator lets you set your own per-injection count.
How many vials will I need?
Divide the total number of doses your protocol requires by the doses per vial, then round up. Doses per vial comes straight from the reconstitution math — total peptide divided by your dose.
How much bacteriostatic water will I use?
Multiply the number of vials by the water you add to each. If you reconstitute every vial with 2 mL and need five vials, that's 10 mL of bacteriostatic water across the protocol.
What else should I have on hand?
A sharps disposal container is essential. Beyond that, keep spare syringes and swabs, and store reconstituted vials as appropriate. This tool counts consumables; it does not give medical guidance.