Research tool
Peptide Reconstitution Calculator
Work out the concentration and the volume to withdraw for a reconstituted research peptide. Enter the amount in the vial, how much bacteriostatic water you plan to add and, optionally, a target amount, and the calculator does the arithmetic. It recommends no amount; all figures are for laboratory research use only.
Inputs
Fills in the vial amount only.
Result
Enter the vial amount and water volume to see the concentration and draw volume.
- Concentration
- Draw volume
- U-100 syringe
- Draws per vial
- Upper-bound estimate: ignores dead volume in the syringe and vial.
Enter a target amount per draw to see the draw volume, syringe units and draws per vial.
Compare water volumes
| Water | Concentration | Draw | U-100 units |
|---|
This tool does reconstitution arithmetic on the values you enter. It is not a dosing protocol and recommends no amount. All compounds are supplied for laboratory research use only, not for human or animal use.
The reconstitution formula
Reconstitution spreads a fixed mass of peptide through a volume of water. Two calculations do all the work:
Concentration (mg/mL) = vial mass (mg) ÷ water added (mL)
Draw volume (mL) = target amount (mg) ÷ concentration (mg/mL)
A worked example
The numbers below are arbitrary, chosen only to show the arithmetic; they are not a recommended amount. Say a vial holds 5 mg of peptide and you add 2 mLof bacteriostatic water. The concentration is 5 ÷ 2 = 2.5 mg/mL (2,500 mcg/mL). To measure out a target amount of, say, 0.25 mg, the draw volume is 0.25 ÷ 2.5 = 0.1 mL. A fully dissolved 5 mg vial holds about20 aliquots of that size.
Frequently asked questions
How do you reconstitute a lyophilised research peptide?
Reconstitution means dissolving a freeze-dried (lyophilised) peptide back into liquid so a known amount can be measured out. The diluent is added slowly down the inside wall of the vial rather than sprayed onto the powder, and the vial is swirled gently, not shaken, until the solution is clear. The volume of liquid added sets the concentration: the same vial in less water is more concentrated, in more water more dilute.
What is the reconstitution formula?
Concentration (mg/mL) = peptide mass in the vial (mg) ÷ volume of water added (mL). To find the volume to withdraw for a target amount: draw volume (mL) = target amount (mg) ÷ concentration (mg/mL).
How much bacteriostatic water should be added to a vial?
There is no single correct volume; it is chosen for convenience. More water makes each measured amount easier to read on the syringe but dilutes the solution, and less water concentrates it. Common working volumes are 1, 2, 3 or 5 mL. The comparison table shows several volumes side by side, so you can pick one that puts your target amount at an easy-to-read point on the syringe.
What does 'draws per vial' mean?
It is the vial mass divided by the target amount per draw: an estimate of how many equal aliquots of that size a fully dissolved vial contains. It ignores dead volume left in the syringe and vial, so treat it as an upper bound for planning.
Does the amount of water change how much peptide is in the vial?
No. The total peptide mass is fixed by the product. More or less water only changes the concentration (mg per mL), and so the volume you withdraw to measure out a given amount. It does not change the total amount available.
Are these calculations a dosing recommendation?
No. The calculator does arithmetic on the values you enter and recommends no amount, frequency or route. All Certified Research Peptides compounds are supplied for laboratory research use only and are not for human or animal use. Nothing on this page is medical guidance.
This calculator is a laboratory convenience tool that does arithmetic on the values you enter. It recommends no amount, frequency or route of administration and is not medical guidance. All products sold by Certified Research Peptidesare for laboratory research use only and are not for human or animal consumption.