Free Peptide Tools
Calculators that do arithmetic — mass, volume, concentration, units — and show the formula. They don't tell anyone what dose to use.
Reconstitution Calculator
Concentration (mg/mL) = vial mg ÷ diluent mL. A 10 mg vial with 2 mL of diluent is 5 mg/mL. Free lab-arithmetic calculator with a vial-size chart.
Vial Supply Calculator
Draws per vial = vial content ÷ amount per draw. A 10 mg vial holds 40 draws of 0.25 mg. Free arithmetic calculator for lab inventory planning.
Peptide Calculator
Enter vial mg, diluent mL and an amount: 10 mg in 2 mL is 5 mg/mL, so 0.25 mg is 0.05 mL = 5 units on a U-100 syringe. Arithmetic only, with a chart.
Titration Vial Planner
Add up a step schedule: total mg = Σ(amount × uses) per step, vials = total ÷ vial size, rounded up. Inventory arithmetic for a schedule you already have.
Units Converter
Units = (mg ÷ mg/mL) × 100 on a U-100 syringe. 0.5 mg at 2.5 mg/mL is 0.2 mL, or 20 units. Free converter with a reference chart and worked examples.
Semaglutide Units Converter
Semaglutide units = (mg ÷ mg/mL) × 100. At 2.5 mg/mL, 0.25 mg is 0.1 mL = 10 units. Arithmetic for compounded or research vials; branded pens are dosed in mg.
Tirzepatide Units Converter
Tirzepatide units = (mg ÷ mg/mL) × 100. At 10 mg/mL, 2.5 mg is 0.25 mL = 25 units. Arithmetic only; branded Zepbound and Mounjaro pens are dosed in mg.
Semaglutide Reconstitution Calculator
Semaglutide concentration = vial mg ÷ diluent mL. A 5 mg vial with 2 mL is 2.5 mg/mL. Arithmetic with a vial-size chart; not dosing advice.
Tirzepatide Reconstitution Calculator
Tirzepatide concentration = vial mg ÷ diluent mL. A 30 mg vial with 3 mL is 10 mg/mL. Arithmetic with a vial-size chart; not dosing advice.
Retatrutide Calculator
Retatrutide vial math: 10 mg in 2 mL is 5 mg/mL, so 1 mg is 0.2 mL = 20 units. Retatrutide is investigational, with no approved dose; trial schedules are linked.
BAC Water Calculator
Water (mL) = vial mg ÷ target mg/mL. For 5 mg/mL from a 10 mg vial, add 2 mL of bacteriostatic water. Arithmetic with a chart of common vial sizes.