FOR RESEARCH USE ONLY — This calculator is a laboratory tool for in-vitro research sample preparation. Not for human use.

Peptide Reconstitution Calculator for In-Vitro Research

Calculate peptide solution concentration (mg/mL, mcg/mL) and aliquot volume (mL) for in-vitro laboratory sample preparation. Enter the lyophilized peptide mass, the volume of bacteriostatic water, and the target aliquot amount to obtain the resulting concentration and the aliquot volume needed to isolate that mass.

Example calculations

Peptide mass	Solvent volume	Concentration	Aliquot volume for 250 mcg
5 mg	2 mL	2.5 mg/mL (2500 mcg/mL)	0.100 mL
5 mg	1 mL	5.0 mg/mL (5000 mcg/mL)	0.050 mL

How to reconstitute a research peptide for in-vitro use

Weigh the lyophilized research peptide and record the total mass in milligrams (mg).
Select the bacteriostatic water volume appropriate for your target working concentration and record it in milliliters (mL).
Dispense the bacteriostatic water slowly down the inside wall of the vial — do not inject directly onto the lyophilized peptide cake. Swirl gently; do not vortex.
Allow the solution to stand at room temperature for 2–5 minutes until fully dissolved, or place on a rocker at low speed.
Enter the peptide mass (mg), solvent volume (mL), and target aliquot amount (mcg) into the calculator to obtain concentration and aliquot volume.
Pipette the calculated aliquot volume (mL) into your labeled research vessel. Store unused reconstituted solution at -80°C per your laboratory protocol.

Frequently asked questions

What does this peptide reconstitution calculator do?

This tool calculates the resulting solution concentration (mg/mL and mcg/mL) and aliquot volume (mL) when a lyophilized research peptide is dissolved in a measured volume of bacteriostatic water. It is designed for in-vitro laboratory sample preparation only.

How do I use the peptide reconstitution calculator for in-vitro preparation?

Enter the lyophilized peptide mass in milligrams, the volume of bacteriostatic water you plan to add in milliliters, and your target aliquot amount in micrograms. The calculator returns the solution concentration in mg/mL and mcg/mL, plus the aliquot volume in milliliters needed to isolate that amount for in-vitro use.

What volume of bacteriostatic water should I add for in-vitro reconstitution?

For in-vitro research, common reconstitution volumes range from 1 mL to 2 mL per 5 mg of lyophilized peptide, depending on your target working concentration. Consult your laboratory protocol for the appropriate solvent volume for your specific compound and application.

What is aliquot volume in peptide reconstitution?

Aliquot volume is the volume of reconstituted solution (in mL) required to isolate a specified mass of peptide (in mcg) for a single in-vitro laboratory sample. It is calculated by dividing the target aliquot mass by the solution concentration.