Peptide Dosing,made clear.

The basics are simple: strength, liquid volume, concentration and target amount. Choose the tool that matches what you actually have in front of you.

Arithmetic only — not a dose recommendation.

These tools convert numbers you already know. They do not choose a target amount. For pens, you must also confirm the exact device type and click/dose-selector system; for vials, confirm concentration and syringe type before converting between mg, mL and syringe units.

Important if you are using a pen

Using a peptide pen? Start here.

Do not guess the device, click scale or technique from appearance. Watch the pen guide and confirm the exact device before using click calculations.

Watch: how to use a peptide pen Learn dosing & calculations

Choose your format

What the numbers mean

Read the label before you calculate.

Vial label

10 mg

total peptide

mg = amount of peptide

Look on the vial label for the total amount, for example 10 mg.

2 mL

liquid added

mL = liquid volume

mL describes liquid. It is not the same thing as mg.

100 units = 1 mL

Units = syringe volume marks

On a U-100 syringe, the unit scale is another way of measuring liquid volume.

1 mg

equals

1,000 mcg

mg and mcg are both amounts

mcg is simply a smaller unit. The calculator converts between them.

Core formula

Concentration = total peptide ÷ liquid volume

Example: 50 mg in 2.5 mL = 20 mg/mL. If a target amount is selected, volume = target amount ÷ concentration. On a U-100 syringe, 1 mL corresponds to 100 units.

Simple calculator

Use the numbers in front of you.

Opened from Melanotan II. The profile context does not change the arithmetic or choose a target amount.

1. Vial strength

Find this on the vial label.

2. Liquid volume

The amount of liquid added.

3. Target amount

Amount, not liquid volume.

4. Result

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Does body size change the amount?

Sometimes. But there is no universal peptide rule based on height or weight.

Some approved medicines use fixed amounts. Others explicitly use body weight, such as mg/kg, or body-surface area, which can use both height and weight. Height by itself is not a general dosing rule.

The Pep Report therefore never scales a target amount automatically from body size. If a study, prescribing label or qualified clinician uses a weight- or BSA-based method, start with that known amount and use our calculator only for the arithmetic conversion.

FDA guidance on weight/BSA-based dosing

Reference cards

Common research reference ranges.

These cards put The Pep Report’s research reference amounts and schedules in one place. They are educational references rather than individualized recommendations. Open a peptide to see the evidence, formulation context and detailed dosing notes behind the number.

Human component data · combination unproven