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Concentration and volume calculator

Convert substance mass and final solution volume. You provide every input; the result describes a mathematical relationship only.

This tool does not select a substance or dose for a person. It does not determine preparation, administration or storage instructions.

Enter the final solution volume, not just the volume of added liquid.

Leave blank to calculate concentration only. This is your input, not a suggested dose.

Enter a positive number from 0.000000001 to 1,000,000,000 with up to 9 decimal places. A decimal point or comma is accepted, without thousands separators. These are calculation limits, not medical limits.

How the calculation works

Concentration = total mass ÷ final volume. Volume for the entered mass = that mass ÷ concentration. 1 mg = 1000 µg.

JavaScript is required for interactive calculations. The formula remains available for manual checking.

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