The Peptide Playbook

Peptide Calculator

Pick your three numbers. It shows exactly how many units to draw, how many doses your vial holds, and your concentration, instantly.

Welcome back — your last setup is loaded.
1

Your Dose

How much peptide you want per injection.
2

Peptide Strength

The total mg printed on your vial.
mg
Common strengths: BPC-157 / TB-500 10mg  ·  GLP-1s 10mg  ·  NAD+ 1000mg
3

Bacteriostatic Water

How much water you add to the vial. This sets your concentration.
mL
Common amounts: GLP-1s 2mL–3mL  ·  Most peptides 2mL  ·  NAD+ 5mL
4

Syringe Size

Your insulin syringe (U-100). Used to check your dose fits.

Your Result

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Draw Syringe To
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Peptide Dose
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Doses Per Vial
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Concentration
Your vial & syringe, live
Reconstituting a peptide vial
Reconstitute clean, then dose with confidence
The Peptide Playbook

You’ve got the numbers.
Now get the know-how.

This calculator answers one question. The Peptide Playbook answers the other hundred — reconstitution done right, storage that protects your vials, timing, stacking, and the details nobody tells you until you’ve wasted one. Everything I know, organized so you can actually use it.

Get the Playbook →
Educational and informational only. Not medical advice. This tool performs arithmetic on the numbers you enter and does not tell you what to take. The compounds referenced are, in most cases, not FDA-approved for human use and are sold as research chemicals not for human consumption; laws vary by location. Always confirm your protocol with a qualified physician and start at the lowest effective dose. You must be 18 or older to use this tool.
A free tool from The Peptide Playbook by Forest Knott

How it works (worked example)

Say your vial is 5 mg, you add 3 mL of bacteriostatic water, and you want a 250 mcg dose.

First the tool finds your concentration: 5 mg ÷ 3 mL = 1.67 mg/mL. Then the volume for your dose: 0.25 mg ÷ 1.67 mg/mL = 0.15 mL. On a U-100 insulin syringe, 1 mL = 100 units, so 0.15 mL is 15 units. Your 5 mg vial holds 20 doses at that size.

The rule that matters: "units" is just how far you pull the plunger, it is not your dose. Your dose only makes sense once you know the vial size and the water you added. That is exactly what this tool locks in for you.

Name your dose card

Pick the peptide this card is for — the name is printed on the saved image.