How to Use the Peptide Calculator

This guide explains every input and result of the Peptide Calculator, so you can follow the arithmetic yourself. It covers mathematics only and is not medical advice.

What the calculation means

You start with a known amount of powder, dissolve it in a known volume of liquid, and want to know how much of that liquid contains a chosen amount. The calculator turns that into concentration, volume and syringe units.

The inputs

Vial amount and unit: the total amount in the vial, in mg or mcg.
Solution volume: the volume of liquid in mL.
Target amount and unit: the amount you want to measure out, in mcg or mg.
Syringe: 0.3 mL (30 units), 0.5 mL (50 units) or 1.0 mL (100 units).

The formulas

Concentration = vial amount ÷ solution volume.
Volume = target amount ÷ concentration.
U-100 units = volume in mL × 100.
Portions per vial = vial amount ÷ target amount, rounded down.
1 mg = 1000 mcg.

Worked example (mathematical example only)

Vial 5 mg, solution 2 mL, target 250 mcg. Concentration = 5 ÷ 2 = 2.5 mg/mL = 2500 mcg/mL. Volume = 250 ÷ 2500 = 0.1 mL. Units = 0.1 × 100 = 10. Portions = 5000 ÷ 250 = 20.

Common mistakes

Mixing up mg and mcg, which changes a result by a factor of 1000.
Typing a volume in units, or units in mL.
Ignoring a syringe-capacity warning. If the volume exceeds the syringe, the calculator says so.

Reconstitution guide · Unit conversion guide · FAQ

Mathematical calculation only. Not medical advice.