Peptulator

Questions from the bench

How do I convert a peptide dose into insulin syringe units?

Divide the milligrams in the vial by the millilitres of bacteriostatic water to get the concentration in mg/mL. Divide your dose by that concentration to get the volume in mL. Multiply by 100 for units on a standard U-100 insulin syringe. For example, 10 mg in 2 mL is 5 mg/mL; a 2 mg dose is 0.4 mL, which is 40 units.

Does adding more bacteriostatic water change my dose?

No. The amount of peptide in the vial is fixed. Water only changes the concentration, so it changes how many units you draw for the same dose. More water means a larger, easier to read draw of a weaker solution.

How many units is 1 mL on an insulin syringe?

On a standard U-100 insulin syringe, 1 mL is 100 units. On a U-40 syringe, usually veterinary, 1 mL is 40 units. Check the scale printed on your barrel before drawing.

What is the difference between mg and mcg?

1 mg equals 1000 mcg. GLP-1 compounds such as retatrutide, tirzepatide and semaglutide are usually dosed in mg. Repair and growth-hormone peptides such as BPC-157, ipamorelin and sermorelin are usually dosed in mcg.

Is this calculator medical advice?

No. It is a unit-conversion tool. It converts a vial strength and a water volume into a draw volume and a syringe mark. It does not decide what you should take. Most compounds listed are sold for research use only and are not approved for human use.