Prism Labs

Peptide calculator

Reconstitution, dose and syringe units

Peptide calculator

Guide
Quick pick
Quick pick

Most vials in the guide hold 3 mL total, so more than 3 mL of H2O will not fit. NAD+ uses a 10 mL vial; Glutathione may arrive in a 5 mL or 10 mL vial, so check the vial received.

Quick pick
Syringe size the insulin syringe you are using (1 mL is most common)

Every syringe size uses the same U-100 scale: 100 units = 1 mL, so a 1 mL syringe filled to 100 is one full draw. Results are rounded to the nearest whole unit; the exact mL is shown below.

Draw to— units

on a 1 mL U-100 syringe

Enter your vial size, Prism H2O volume, and dose to see how many units to draw and the volume in mL.

Liquid per dose
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Concentration
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Doses per vial
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Peptide reconstitution chart

Concentration for common vial sizes, and how much peptide one unit (0.01 mL) on a U-100 insulin syringe holds.

Vial1 mL Prism H2O2 mL Prism H2O3 mL Prism H2O
5 mg5 mg/mL50 mcg per unit2.5 mg/mL25 mcg per unit1.67 mg/mL16.7 mcg per unit
10 mg10 mg/mL100 mcg per unit5 mg/mL50 mcg per unit3.33 mg/mL33.3 mcg per unit
20 mg20 mg/mL200 mcg per unit10 mg/mL100 mcg per unit6.67 mg/mL66.7 mcg per unit
30 mg30 mg/mL300 mcg per unit15 mg/mL150 mcg per unit10 mg/mL100 mcg per unit
50 mg50 mg/mL500 mcg per unit25 mg/mL250 mcg per unit16.7 mg/mL166.7 mcg per unit
100 mg100 mg/mL1,000 mcg per unit50 mg/mL500 mcg per unit33.3 mg/mL333.3 mcg per unit

Calculator FAQs

Understanding the calculation

What does this calculator calculate?
  • Enter three things: how much peptide is in the vial (mg), how much Prism H2O you add (mL), and the dose from your protocol (mg or mcg).
  • It works out how much liquid holds that dose, and how many units that is on a U-100 insulin syringe.
  • It only does the math. It does not choose a dose for you.
How are mg, mcg and mL related?
  • mg and mcg measure how much peptide there is. 1 mg = 1,000 mcg.
  • mL measures how much liquid there is.
  • Example: 10 mg of peptide in 2 mL of liquid means each 1 mL holds 5 mg. That is the concentration: 5 mg/mL.
  • Adding more liquid spreads the same peptide thinner. It does not add more peptide.
What do the units on the syringe mean?
  • The numbers printed on a U-100 insulin syringe are units. 100 units = 1 mL, 10 units = 0.1 mL, 1 unit = 0.01 mL.
  • Units measure how much liquid you draw, not how much peptide is in it.
  • How much peptide is in that liquid depends on the concentration, which is what this calculator works out. It is for U-100 syringes only.
How many units is 250 mcg?
  • It depends on the concentration, so work that out first: vial mg ÷ mL of Prism H2O.
  • 10 mg in 2 mL is 5 mg/mL. One unit (0.01 mL) then holds 50 mcg, so 250 mcg is 5 units.
  • 10 mg in 3 mL is 3.33 mg/mL. One unit holds 33.3 mcg, so 250 mcg is 7.5 units.
  • The calculator above does this for any numbers you enter, and the chart below lists common vial sizes.
Can I calculate without creating an account?
  • Yes. It is free, and you do not need to sign in.
  • Enter your values and choose mg or mcg for the dose.
  • Use Reset calculator to clear the values and start again.
Does the result verify my preparation?
  • No. It checks the math using the numbers you enter.
  • It cannot check what is in the vial, whether the materials can be mixed, or whether the preparation is sterile or stable.
  • Check the label, batch report and your lab procedure separately. The result is not a personal-use instruction.
Video walkthrough

How to reconstitute

Follow the full preparation process from start to finish.