Peptide calculator

Enter what's in your vial, the water you added and your dose. See the concentration and exactly where to draw.

Peptide in the vial

The amount of powder printed on the vial label.

Water added

How much bacteriostatic (BAC) water you mixed into the vial.

Desired dose

The amount you've decided to take each time.

mcg

Syringe size

Standard U-100 insulin syringe, where 100 units = 1 mL.

How it works

1Peptide in the vial. The powder amount on the label, in mg.
2Water added. How much BAC water you mixed in, in mL. Together these set the concentration.
3Desired dose. The amount you've already decided on, in mcg or mg.
4Syringe size. The calculator converts the volume into the mark on your U-100 syringe.

Concentration = mg in vial ÷ mL of water Volume to draw = dose ÷ concentration Units = volume in mL × 100

Common questions

What's a U-100 syringe?

The standard insulin syringe. It's marked in units, and 100 units equals 1 mL, so 10 units is 0.1 mL. A 0.3 mL syringe holds 30 units, a 0.5 mL holds 50 and a 1 mL holds 100.

Why does the amount of water matter?

Water doesn't change how much peptide is in the vial, only how concentrated it is. More water means a larger volume for the same dose, which is easier to read on a small syringe. Less water means a smaller, more concentrated draw.

My vial is labeled in IU, not mg.

IU-to-mg conversions are specific to each compound, so there's no general rule. Use the conversion in the documentation that came with your vial before entering numbers here.

Do you store what I enter?

No. Everything runs in your browser. Nothing is sent to us or saved anywhere.

Track it in Ampiva

The private tracker for peptides and GLP-1s. Log doses in one tap, keep tabs on every vial, and see how your check-ins, weight and labs line up with your protocol.

One-tap dose logVial inventoryDaily check-insWeight & labsPrivate by design

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