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Interactive tool · Dosing math

Peptide Dosing Calculator

Pick a peptide, enter a target dose, and this tool tells you the hard-to-eyeball part: the exact units to draw on a U-100 insulin syringe, how many doses your vial yields, and — if you add a price — what each shot costs. It is math, not a dose recommendation.

Read before you use this

This is an educational math tool, not medical or dosing advice, and not a recommendation to use any peptide. Most research peptides (BPC-157, TB-500, CJC-1295, ipamorelin, and similar) are not FDA-approved for human use, are sold through a grey market where purity and labeling are not guaranteed, and are prohibited in tested sport under the WADA Prohibited List. Any dose, the peptide presets below, and injection technique must be directed and supervised by a licensed clinician. Never self-prescribe. Verify the certificate of analysis (COA) and the vial label, and treat every figure here as a number to confirm with your prescriber.

Start from a peptide
Body Protection Compound — recovery peptide, not FDA-approved. Presets only prefill a typical vial size and a commonly-discussed dose as a calculation starting point — not a recommended protocol.
Target dose
The amount you want in a single shot. Most research-peptide doses are in micrograms (mcg). 1 mg = 1000 mcg.

Draw on a U-100 insulin syringe

10units

to deliver a 250 mcg dose = 0.1 mL.

Concentration
2.5 mg/mL
= 2500 mcg/mL · 5 mg ÷ 2 mL
Doses per vial
20
5 mg ÷ 0.25 mg
Cost per dose
add vial price

How it is calculated. Concentration = vial (mg) ÷ bacteriostatic water (mL). Volume to draw = dose (mg) ÷ concentration. A U-100 insulin syringe holds 100 units per 1 mL, so units to draw = volume (mL) × 100. Doses per vial = vial (mg) ÷ dose (mg), and cost per dose = vial price ÷ doses per vial. Worked example: a 5 mg vial reconstituted with 2 mL = 2.5 mg/mL (2500 mcg/mL); a 250 mcg dose = 0.1 mL = 10 units, giving 20 doses per vial — at $55 a vial that is $2.75 per dose.

Need to plan the mix instead?

This calculator is dose-first — start from how much you want per shot and work out the units, doses per vial, and cost per dose. If you are instead deciding how much water to add to hit a target concentration, use the reconstitution & dosage calculator. Tested athletes should also confirm anti-doping status with the WADA prohibited-status checker.

Frequently asked questions

How do I calculate a peptide dose in insulin-syringe units?
First find the concentration: divide the peptide mass in the vial (mg) by the bacteriostatic water you added (mL). Divide your target dose (in mg) by that concentration to get the volume to draw in mL, then multiply by 100, because a U-100 insulin syringe holds 100 units per 1 mL. Example: a 5 mg vial in 2 mL of water is 2.5 mg/mL; a 250 mcg (0.25 mg) dose is 0.1 mL, which is 10 units.
How many units is 250 mcg of BPC-157?
It depends entirely on the concentration. If a 5 mg BPC-157 vial is reconstituted with 2 mL of bacteriostatic water, the concentration is 2.5 mg/mL and 250 mcg is 0.1 mL, which is 10 units on a U-100 syringe. Reconstitute the same vial with 1 mL instead and 250 mcg becomes only 5 units. Always enter your own numbers — there is no universal unit answer.
How many doses are in a peptide vial?
Divide the total peptide mass in the vial by your dose per shot. A 5 mg vial at 250 mcg (0.25 mg) per dose yields 20 doses. The amount of water you reconstitute with does not change the number of doses — it only changes how many units each dose is on the syringe.
How is cost per peptide dose calculated?
Cost per dose is the vial price divided by the number of doses the vial yields. A $55 vial that gives 20 doses works out to $2.75 per dose. Enter the vial price you actually paid to see this figure; leave it blank to skip it.
Is this peptide dosing calculator medical advice?
No. It performs unit arithmetic only and is not medical, dosing, or anti-doping advice, and not a recommendation to use any peptide. Most research peptides such as BPC-157 and TB-500 are not FDA-approved for human use, are sold on a grey market with unverified purity, and are prohibited in tested sport. Any decision to use a peptide and any dose must be directed by a licensed clinician.

Understand the context first

A number on a syringe is the easy part. Whether a research peptide is appropriate, safe, or legal to use at all is the part that actually matters — read these before you draw anything:

Medical disclaimer: This content is for general educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a licensed healthcare professional before starting, stopping, or changing any treatment.

This calculator is informational and performs unit arithmetic only. It does not account for your individual health, the specific product, injection technique, or clinical appropriateness. Research peptides such as BPC-157 and TB-500 are largely not FDA-approved for human use, are sold on the grey market with unverified purity, and are prohibited in tested sport. Talk to a licensed clinician before acting on any number here.