Research tools
Peptide reconstitution calculator
Work out the concentration of a reconstituted vial, the exact volume to draw, and how many draws a vial yields. Results update as you type.
Step 01
Amount per draw
Step 02
Vial strength
Step 03
Reconstitution water added
Results
Draw to
10units
0.1 mL
- Concentration
- 2.5 mg/mL
- Volume to draw
- 0.1 mL
- Draws per vial
- 20
For research use only. This calculator is a laboratory measurement aid for reconstituting research materials. It is not medical or dosing guidance. Nothing sold by PepXtide is for human or veterinary consumption, and none of it has been evaluated by the FDA.
How to use it
Four steps
01
Set the amount per draw
How much peptide you want in a single draw, in milligrams. Pick a preset or type your own.
02
Enter the vial strength
How much peptide the vial contains, printed on its label. Common sizes are 5mg, 10mg and 15mg.
03
Enter the solvent volume
How much reconstitution water you added. More water means a weaker solution and a larger volume to draw.
04
Read the syringe
The meter shows where to stop on a 1 mL U-100 syringe, along with the concentration and how many draws the vial yields.
Why the water volume matters
The volume of solvent sets the concentration, not the potency. The same 5mg vial reconstituted with 1 mL gives 5 mg/mL, and with 2 mL gives 2.5 mg/mL. Adding more water simply means drawing a larger volume for the same amount of peptide, which is often easier to measure accurately.
Refrigerate once reconstituted
A reconstituted vial has to go into a refrigerator at 2-8C, kept sealed and away from light, and is generally usable for around 30 days. Sealed lyophilized powder is the stable form and belongs in a freezer at -20C, where it keeps for years. Water is what starts the clock, so nothing should be reconstituted until it is going to be used.
Every compound in the catalogue lists its form and storage conditions on its own page.
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