Peptide reconstitution calculator
Enter your vial strength and the bacteriostatic water you’re adding to get the reconstituted concentration in mg/mL. For laboratory research use only.
Your vial & diluent
Reconstituted concentration after adding 2 mL
This tool reports the reconstituted concentration only. Strictly for laboratory research — always follow your own protocol.
How to reconstitute
Slowly add the diluent down the side of the vial onto the peptide. Never spray directly onto it. Let it dissolve — swirl gently, don’t shake.
Enter the vial strength and the volume of water above to get the reconstituted concentration in mg/mL.
Store the reconstituted solution refrigerated and avoid repeated freeze-thaw. For laboratory research use only.
Good to know
- Concentration = total peptide ÷ diluent volume, expressed in mg/mL.
- More water gives a lower concentration; less water gives a higher concentration.
- The amount of water changes the concentration, not the total peptide in the vial.
Handling & safety
- Use bacteriostatic water for multi-use vials; sterile water for single use.
- Keep everything sterile and wipe the stopper with alcohol before each use.
- Strictly for laboratory research. Not for human or animal consumption.
Calculator questions
What is bacteriostatic water?
Sterile water containing 0.9% benzyl alcohol, which lets a reconstituted vial be used multiple times over a period. It’s the standard diluent for lyophilized research peptides.
How much water should I add?
There’s no single right answer. More water gives a lower concentration (mg/mL); less water gives a higher one. 1 to 3 mL is common. The calculator reports the concentration for whatever volume you choose.
What does the calculator show?
It reports the reconstituted concentration only — the amount of peptide per millilitre of solution (mg/mL and mcg/mL) — based on the vial strength and diluent volume you enter. It is a laboratory reference calculation.
Is this medical advice?
No. This tool is for laboratory and research calculations only. Products are not for human or animal consumption.
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