Doctor Pharmacist

Peptide dosage calculator

Enter your vial strength, the diluent you add and the dose you were prescribed. The result updates as you type.

1What’s in your vial?
mg

Enter the number printed on the vial label (the total in the vial, not your dose).

Example vial label. The number to enter is the mg amount printed on your own vial’s label. PEPTIDE # mg For research use only Enter this
mL

If you added 2 mL of water to the vial, enter 2.

For a 2.5 mg dose, enter 2.5.

4How will you measure it?
units to draw

Working backward? Type your units in the units box to find the dose.

Units key
mg
milligrams
mcg
micrograms
mL
milliliters
units
markings on a U-100 syringe or pen

1 mg = 1,000 mcg · 1 mL = 100 units · 1 unit = 0.01 mL

DRAW TO
units on a U-100 syringe

Exact: — units before rounding up · Know how many units you use? Type them in the units box to see what dose that is.

Syringe filled to the number of units to draw 102030405060708090100

Pull the plunger back until its black edge lines up with this mark.

Fill in steps 1–3 to see how many units to use.

Concentration
—
Strength per unit
—
Volume per dose
—
Doses per vial
—

How this is calculated

  1. mg ÷ mL = concentration
  2. dose (mg) ÷ concentration = mL
  3. mL × 100 = units (1 unit = 0.01 mL)
  4. Rounded up to the next whole unit

Blends: the math uses the amount of the ingredient you dose by (or the total). Every unit carries all ingredients in the same ratio.

Double-check with your prescriber

This tool does arithmetic only. It does not recommend a dose. Confirm volumes with a pharmacist before injecting.

Common questions

How do you convert mg to units for a peptide?

Divide the mg in the vial by the mL of water added to get mg per mL. One unit on a U-100 syringe is 0.01 mL, so mg per unit = (vial mg ÷ water mL) × 0.01. Units = dose ÷ mg per unit. Example: 10 mg in 2 mL is 5 mg/mL, 0.05 mg per unit, so a 0.25 mg dose is 5 units.

How many units is 0.25 mg?

It depends on the vial strength and the water added. With 10 mg in 2 mL, 0.25 mg is 5 units; with 5 mg in 2 mL it is 10 units; with 10 mg in 2.1 mL it is 6 units (5.25, rounded up). Enter your own numbers above.

What is the difference between mg and mcg?

1 mg (milligram) = 1,000 mcg (micrograms). A 250 mcg dose is 0.25 mg. The calculator accepts either; pick the unit next to the dose box.

How many units are in 1 mL?

A U-100 syringe or pen holds 100 units per mL, so 1 unit = 0.01 mL, 10 units = 0.1 mL and 50 units = 0.5 mL.

Why does the calculator round up?

Syringe and pen markings are whole units, so the result is rounded up to the next whole unit. The exact value is shown under the result.

Can I use the calculator for blends?

Yes. Choose Blend, pick a preset (such as CJC-1295/Ipamorelin or BPC-157/TB4) or enter each ingredient, and the calculator shows what each dose contains.