Dose Calculator
Work out your exact syringe draw in seconds.
Peptide in vial
Enter the total peptide amount listed on your vial label.
Check your label for the total mg — BPC-157 ~10 mg, Retatrutide 5–10 mg, NAD+ varies.
Bacteriostatic water
Enter the volume of water you mixed into the vial.
More water makes the draw easier to read. 2–3 mL for most vials, 5 mL for larger ones.
Desired dose
Optional — skip this to just see concentration and example doses.
No target dose? Leave it blank and we'll preview a few common draws.
Your Results
Frequently asked questions
How does the peptide dose calculator work?
It takes three numbers – the peptide amount in your vial, the volume of bacteriostatic water you added, and your target dose – and works out the concentration of the reconstituted solution. From there it converts your dose into the volume you need to draw, shown in both microliters and insulin syringe units, plus how many total doses the vial contains.
What syringe does this calculator assume?
The unit reading assumes a standard U-100 insulin syringe, where 100 units equals 1 mL (so 1 unit = 0.01 mL = 10 µL). If you use a different syringe type, rely on the microliter (µL) value instead of the unit value.
How much bacteriostatic water should I add?
There's no single correct amount – it only changes the concentration, not the total peptide. Most people use 2–3 mL for a standard vial and up to 5 mL for larger ones. More water means a larger, easier-to-measure draw at the same dose; less water means a smaller draw. Pick a volume that puts your typical dose in a comfortable, readable range on the syringe.
How do I convert mg to mcg for my dose?
1 mg equals 1000 mcg. To go from mg to mcg, multiply by 1000 (e.g. 0.25 mg = 250 mcg). To go from mcg to mg, divide by 1000 (e.g. 500 mcg = 0.5 mg). The MG/MCG toggle on the dose field handles this conversion for you automatically.
For research and educational use only – not medical or dosing advice. Estimates only; always double-check each figure before you rely on it.