Concentration Calculator

Calculate solution concentration (molarity). Free online molarity and concentration calculator.

The Concentration Calculator computes molarity and other concentration measures for chemical solutions. Enter moles of solute and volume of solution to find molarity, or work backwards from concentration to find required amounts. Essential for preparing lab solutions, dilutions, and quantitative chemistry.

Common use cases

  • Preparing laboratory solutions
  • Quality control in manufacturing
  • Medical and pharmaceutical dosing
  • Environmental analysis
  • Chemical research

How to use

  1. Choose what to calculate
  2. Enter moles, volume, or concentration
  3. Select appropriate units
  4. Click calculate for the result
  5. View the formula used

FAQ

What is molarity?

Molarity (M) = moles of solute / liters of solution. A 1 M solution has 1 mole per liter.

How do I prepare a specific molarity?

Calculate moles needed (M × V in liters), then find mass using molar mass.

What's the difference between molarity and molality?

Molarity uses liters of solution; molality uses kilograms of solvent. Molality doesn't change with temperature.

Can I convert between mass and moles?

Yes, use molar mass: moles = mass (g) / molar mass (g/mol).