Dosing & Reconstitution Tool

Peptide Dosing & Reconstitution Calculator

Two steps: mix your vial, then draw your dose. Enter your vial size and BAC water, and the tool converts your dose into insulin-syringe units.

Educational only, not medical advice.This calculator is for informational purposes. Doses, reconstitution ratios, and administration methods vary by compound and individual. Always consult a licensed healthcare provider before using any compound.Read the reconstitution guide →

Common peptide presets

Swipe for more presets →

Mix your vial

What's in the vial, and how much water you're adding.

Peptide in vial (mg)

BAC water to add (mL)

Your concentrationEnter vial size and water above.

Draw your dose

How much you want per injection, and which syringe you're using.

Desired dose

Syringe type

U-100 insulin syringe (1 mL = 100 units)

Supply & cost (optional)How long a vial lasts, and what each dose costs.

Injection frequency (for supply math)

Used only to divide doses per vial into days. Not a schedule recommendation.

Vial price (optional, USD)

What you paid for this vial, to get cost per dose.

units to draw

Concentration

Draw volume

Doses / vial

Your dose

Enter your vial size, BAC water, and dose to see your draw.

How to mix it (quick steps)

Let both vials reach room temperature; wipe both stoppers with an alcohol pad.
Draw your BAC water into a transfer syringe.
Inject it against the glass wall, not straight onto the powder.
Don't shake. Gently swirl, the powder dissolves in a minute or two.
The solution should be clear. Cloudy or particles = don't use it.
Store in the fridge; draw doses with an insulin syringe as needed.

Reconstituted peptides are typically kept refrigerated and used within a few weeks.Read the full reconstitution guide →

Email me this calculation

Get this result plus related reconstitution and dosing guides sent to you. Optional, the calculator stays free.

How to use this calculator

Enter the total peptide mass in your vial (e.g., 5 mg)
Enter how much BAC water you're adding, or tap "Suggest water for me"
Enter your desired dose in mcg or mg
Select your syringe type (U-100 is most common)
Optionally add frequency and vial price for days of supply and cost per dose

Units are rounded to the nearest 0.5 for practical measuring, the exact figure is shown beneath the result. The syringe diagram shows fill level.See full reconstitution guide →

Syringe types explained

U-100

1 mL / 100 units

Most common for peptides. 1 unit = 0.01 mL.

U-50

0.5 mL / 50 units

Half-capacity syringe. Still 100 units/mL, so same math as U-100.

U-40

1 mL / 40 units

Older/veterinary standard. 1 unit = 0.025 mL, DIFFERENT from U-100. Common mistake source.

U-40 warning: Never use a U-40 syringe with U-100 calculations. You'll draw 2.5× too much. Always confirm your syringe type before drawing.

Ready to go deeper?

Full step-by-step reconstitution walkthrough, storage tips, and injection basics.

Reconstitution Guide Find a Provider Peptides 101

Educational only, not medical advice.This calculator is a mathematical tool only. Dosing protocols vary by compound and individual. Consult a licensed healthcare provider before using any peptide.