Solution Concentration Converter

Summary

Convert solution concentrations between molarity (M), molality (m), normality (N), mass percent (w/w%), volume percent (v/v%), and parts per million (ppm).

How it works

1. Enter the known concentration value and select its unit from the dropdown.
2. Provide the solute molar mass (g/mol) — required for most conversions.
3. Provide the solution density (g/mL) — required for molarity and volume-based conversions.
4. Optionally enter the equivalents per mole (n-factor) to compute normality.
5. Click Convert to instantly see results in all supported units.
6. Use the Reset button to clear all fields and start a new conversion.

Use cases

• Convert a lab reagent bottle label from mass percent to molarity.
• Prepare buffer solutions at a specified molality for temperature-sensitive experiments.
• Convert ppm readings from environmental water tests into molar concentrations.
• Cross-check normality values when standardizing titration solutions.
• Convert between units when following procedures from different regional textbooks.
• Verify concentration calculations before mixing hazardous chemicals.
• Teach students the relationships between concentration expressions.
• Quickly check stock solution concentrations in pharmaceutical compounding.

Frequently Asked Questions