All products are for laboratory research purposes only. Not for human consumption.

Tool

Peptide Reconstitution Calculator

Enter a vial strength and a solvent volume. This works out the resulting concentration, how far one vial goes, and where that volume sits on the barrel of the syringe you are using. Everything is calculated in your browser — nothing is sent anywhere and nothing is stored.

Your vial

The strength printed on the vial, and the solvent you are adding to it.

Vial strength

Solvent added

Bacteriostatic or sterile water, typically 1–3 mL.

Amount per draw

Optional. The quantity drawn from the vial each time.

Amount

Your syringe

Which barrel you are reading against.

100-unit insulin 50-unit insulin 1 mL 3 mL

Concentration — —

Volume per draw —

On a 100-unit syringe — 1 unit = 0.01 mL

Draws per vial —

Total in vial —

Where that sits on a 100-unit insulin barrel

Scroll the barrel sideways to read the whole scale.

This calculator needs JavaScript. The arithmetic is short enough to do by hand: concentration = vial strength ÷ solvent volume; volume per draw = amount ÷ concentration; syringe units = volume in mL × 100.

How the numbers are worked out

Concentration = vial strength ÷ solvent volume. A 10 mg vial in 2 mL gives 5 mg/mL.
Volume per draw = amount ÷ concentration.
Syringe units = volume in mL × 100. A 100-unit insulin syringe holds 1 mL, so one unit is 0.01 mL. A 50-unit holds 0.5 mL on the same scale. The 1 mL and 3 mL barrels are marked in millilitres instead, because that is what is printed on them. Either way this is a reading on the barrel, not a recommendation.
Draws per vial = vial strength ÷ amount per draw, rounded down.

This tool performs arithmetic only, for laboratory preparation of research materials. NobelPepLab supplies research chemicals for in vitro and laboratory use, does not provide dosing guidance, and does not supply products for human or veterinary use. Adding solvent to lyophilised material changes how long it stays stable — see handling and storage for working life after reconstitution.