U.S. based·Ships from the U.S.·Free shipping over $150·Most orders ship within 1 business day·For research use only·
Free tool

Peptide dosing calculator.

Reconstituting a lyophilized vial? Enter your vial size, bacteriostatic water, and target dose to get the concentration, the volume per dose, the exact units to draw on an insulin syringe, and how many doses are in the vial — instantly.

Dosing calculator

Peptide reconstitution calculator

Pick a peptide (or enter your own vial size), tell us how much bacteriostatic water you’ll add and your target dose. We’ll do the math.

02550751005u
Draw to5unitson a U-100 insulin syringe · 0.050 mL
5.00mg/mL
Concentration
0.050mL
Per dose
40doses
Per vial
Shop GLP-3 RT 10mgAdd bacteriostatic water

For research use only — not medical guidance. Math assumes the full vial mass dissolves into the bac water you add and a standard U-100 insulin syringe (100 units = 1 mL).

How the calculation works

Reconstitution is just dilution. The dry peptide mass in the vial dissolves into the bacteriostatic water you add, giving a concentration in milligrams per milliliter. From there, the volume you draw for any target dose is simple arithmetic:

  • Concentration = vial size (mg) ÷ bac water added (mL)
  • Volume per dose = target dose ÷ concentration
  • Syringe units = volume per dose (mL) × 100 (a U-100 insulin syringe holds 100 units per mL)
  • Doses per vial = total vial mass ÷ dose size

For step-by-step technique — directing the diluent against the glass wall, swirling instead of shaking, and storage after reconstitution — see our peptide reconstitution guide.

Frequently asked questions

How do I use the peptide reconstitution calculator?

Choose your peptide (or enter the vial size in milligrams), enter how much bacteriostatic water you are adding, and set your target dose. The calculator returns the concentration, the volume per dose in milliliters, the equivalent units on a U-100 insulin syringe, and how many doses the vial contains.

How much bacteriostatic water should I add to a peptide vial?

There is no single correct volume — more water makes each dose easier to draw accurately, less water concentrates the solution. A common starting point is 1–3 mL per vial. Use the calculator to see how your chosen water volume changes the units you draw, then pick a volume that lands your dose in a comfortable, readable range on the syringe.

What are syringe units?

A standard U-100 insulin syringe is marked in units, where 100 units equals 1 milliliter. The calculator converts your dose volume into these units so you can read the draw directly off the syringe barrel.

Is this calculator medical advice?

No. All HelixCore Biotech products are sold strictly for laboratory and research use. This tool performs arithmetic for reconstitution planning only and is not medical or dosing guidance for human or animal use.

Research use only. HelixCore Biotech products are sold strictly for laboratory and research purposes and are not for human or veterinary use. This calculator is a planning tool, not medical or dosing guidance. See our RUO Policy.
Added to cart

Are you 21 or older?

This site contains research materials. By entering, you confirm you are 21+ and accept our Terms & RUO disclaimer.