YeffoHealth · Free tool

Peptide & Hormone Calculator

Pick a calculator, fill in what’s on the vial and your dose, and see exactly where to draw on a U-100 insulin syringe.

Choose a calculator

For peptides measured in mg. Enter the mg in the vial, the bacteriostatic water you’re adding, and your dose in mcg or mg.

Your vial

Example values filled in. Change any field.

printed on the vial
mg
total volume
mL
per injection
Syringe sizeU-100 insulin syringe
Draw to
10units

Pull the plunger to the 10 mark.

U-100 · 0.5 mL1 unit per mark
Concentration
2.5mg/mL
25 mcg per unit
Volume per dose
0.1mL
of 2 mL in the vial
Doses per vial
20
at 250 mcg each

The YeffoHealth Calculator only does math: it converts the numbers you enter into syringe units. It isn’t medical advice or dosage advice, and it doesn’t tell you what dose to take. YeffoHealth is not a healthcare provider. Confirm your dose and mixing with your healthcare provider.

Taking this regularly? Save your vial and schedule in the free YeffoHealth Tracker, with reminders when each dose is due. →

The math

How it’s calculated

Three steps, shown with your numbers. A U-100 syringe holds 100 units per mL, so every unit is 0.01 mL.

  1. Concentration
    peptide (mg) ÷ water (mL)5 mg ÷ 2 mL = 2.5 mg/mL
  2. Volume per dose
    dose ÷ concentration0.25 mg ÷ 2.5 mg/mL = 0.1 mL
  3. Units to draw
    volume (mL) × 1000.1 mL × 100 = 10 units

Peptide & Vial Labels

Put the numbers on the vial, not on a sticky note.

Print-ready vial labels with room for strength, concentration, lot and date. Start from a template or have us design one, then add your own mixing or dosing info.

Browse vial label templates Get a custom design