Resuspension Calculator

Find how much buffer to add to resuspend a sample at a target concentration.

How the Math Works

The Resuspension Calculator uses the formula volume = mass ÷ target concentration to determine how much buffer is needed to dissolve a substance at a desired concentration. By rearranging the concentration equation (concentration = mass/volume), this formula isolates volume as the unknown variable. For example, if you have 10mg of powder and want a final concentration of 5mg/mL, dividing 10 by 5 gives 2mL of buffer required. Units must be consistent (e.g., mg and mg/mL) to ensure accurate results.

Practical Applications

To apply this calculation practically, first measure the mass of the powder or pellet you need to resuspend. Next, decide the target concentration based on your experimental requirements or protocol guidelines. Multiply the mass by the reciprocal of the target concentration to find the buffer volume needed, then add that volume of liquid to your sample while mixing thoroughly until fully dissolved.

Day-to-Day Use

In everyday laboratory or research settings, this tool simplifies critical tasks like preparing cell cultures, biochemical assays, or drug solutions where precise concentrations directly impact results. Students and professionals avoid tedious manual calculations and potential errors, ensuring reproducibility in experiments. Whether in a university lab, pharmaceutical production, or clinical diagnostics, the calculator saves time and guarantees reliable outcomes by quickly providing the exact buffer volume needed.

Worked example

5 mg at 2 mg/mL → 2.5 mL.

FAQ