Precise peptide dosing,
every time.
Calculate reconstitution volumes, injection doses, and syringe measurements for BPC-157, TB-500, Semaglutide, Tirzepatide, Retatrutide and 25+ peptides.
Precise Reconstitution
Enter your vial size and BAC water amount to instantly get concentration, inject volume, and syringe units.
25+ Peptides Covered
Pre-filled data for BPC-157, Semaglutide, Tirzepatide, Retatrutide, TB-500, and every major peptide.
Visual Syringe Guide
See exactly where to draw on a 100-unit insulin syringe with our fill bar indicator.
No Sign-Up Required
Everything runs in your browser. No account, no email, no tracking. Just free, instant calculations.
How the peptide calculator works
Our calculator uses standard pharmaceutical reconstitution formulas.
Enter vial size
Input your peptide vial size in mg (e.g. 5mg for BPC-157).
Add BAC water
Enter how much bacteriostatic water you added to the vial in ml.
Get your dose
Instantly see concentration, inject volume, and syringe units.
The formula
Concentration (mcg/ml) = (Vial mg × 1000) ÷ BAC water (ml) Inject volume (ml) = Desired dose (mcg) ÷ Concentration (mcg/ml) Syringe units = Inject volume (ml) × 100 All Peptide Calculators
Dedicated calculators pre-filled for every major peptide.
Peptide Dosage Chart
Quick reference for all 25+ peptides — typical vial size, dose, BAC water, and syringe units in one printable table.