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Cold-chain shipping · Ships from Canada · Research use only
Pro Peptide
The Peptide Planner

Peptide calculator. Pick the vial, we do the math.

Search the catalog, pick a vial size, and get the reconstitution math and a schedule you can follow. Free with every order.

Step 1

Search the catalog

Doses for

Every dose here is a research reference, not a prescription, and you can change it on any compound after you add it. For research use, not human consumption.

Search to add a compound to your plan.

Type a name or category — 51 in the catalog.

How the peptide calculator works

A lyophilized vial is a fixed amount of compound, in milligrams, as a dry powder. Reconstitution means adding a measured volume of bacteriostatic water so it becomes a solution you can draw from. The calculator takes three numbers: the milligrams in the vial, the millilitres of water added, and the amount wanted in one draw. It returns the concentration, the draw in millilitres and in syringe units, and how many draws the vial holds.

The math, in one example

A 5 mg vial with 2 mL of bacteriostatic water is 2.5 mg per mL. A 250 mcg draw is 0.1 mL. On a 1 mL insulin syringe, where 100 units make 1 mL, that is 10 units, and the vial holds 20 draws of that size.

Vial5 mg
Bacteriostatic water added2 mL
Concentration2.5 mg per mL
One draw of 250 mcg0.1 mL, which is 10 units
Draws in the vial20

More water means a lower concentration and a bigger draw for the same amount; less water means a smaller draw that is harder to measure. A volume that lands the draw between about 5 and 50 units keeps the syringe markings doing the work.

What you need

  • The vial, kept cold and dry until it is mixed.
  • Bacteriostatic water, which carries 0.9% benzyl alcohol so a vial can be drawn from more than once. Plain sterile water has no preservative and suits a single draw.
  • A 1 mL insulin syringe marked in 100 units, so the calculator's unit figure reads straight off the barrel.
  • Alcohol swabs for the stopper.

After mixing

Keep a reconstituted vial cold, between 2 and 8 °C, out of light, and do not shake it. Dry powder keeps far longer than solution. Our storage guide covers what the stability data says by compound, and the guides cover reconstitution step by step.

Common questions

What does a peptide calculator do?
It turns the vial's milligrams and the water you add into a concentration, then turns the amount wanted per draw into millilitres and insulin-syringe units. It also counts how many draws the vial holds.
How much bacteriostatic water goes into a vial?
There is no single right volume; it sets the concentration. One millilitre in a 5 mg vial gives 5 mg per mL, two gives 2.5 mg per mL. A volume that lands the draw between about 5 and 50 units keeps the syringe markings easy to read.
How are units on an insulin syringe read?
A standard 1 mL insulin syringe is marked in 100 units, so one unit is 0.01 mL. A 0.1 mL draw is 10 units and 0.5 mL is 50 units.
Bacteriostatic water or sterile water?
Bacteriostatic water carries 0.9% benzyl alcohol, a preservative that lets a vial be drawn from more than once over days or weeks. Sterile water for injection has no preservative and suits a single use. The calculator assumes bacteriostatic water.
How long does a reconstituted peptide keep?
Shorter than the dry powder, and it depends on the compound. Cold, between 2 and 8 °C, in the dark and undisturbed is the rule. The storage guide covers what the stability data says by compound.

The calculator does the arithmetic for a research vial. It is not medical advice and not a plan for a person. Sold for laboratory research use only. Not for human or veterinary use.