Molarity Calculator

Calculate molarity, amount of solute or solution volume with M = n / V.

Calculator

Choose the value to calculate, then enter the other two values. M = n / V.

Calculate
Molarity1 mol/L
Amount0.5 mol
Volume0.5 L

Formula and assumptions

M = n / V

Molarity is the amount of solute divided by the volume of the final solution. This calculator uses litres for volume and mol for amount of solute.

Assumption: The entered volume is the final solution volume.

Variables and units

  • M — amount concentration (mol/L)
  • n — amount of solute (mol)
  • V — final solution volume (L)

Worked example

For 0.50 mol of solute in 0.50 L of solution, M = 0.50 / 0.50 = 1.00 mol/L.

Important limits

This ideal calculation does not correct concentration for activity, temperature or volume change on mixing.

Reference and related tools

IUPAC: amount concentration. Return to Chemistry Calculators for the other tools in this group.