Chemistry Calculator Grade 11–12 Science With Steps

Molarity Calculator with Steps

Use this free molarity calculator to calculate the molarity of a solution using moles of solute and volume of solution in litres. This tool is useful for chemistry practice, lab reports, and solution concentration problems.

Calculate Molarity

Result:
—

What is Molarity?

Molarity is a measure of concentration. It tells us how many moles of solute are dissolved in one litre of solution.

Molarity (M) = moles of solute ÷ volume of solution in litres

The unit for molarity is mol/L, which is often written as M.

Worked Example

A solution contains 2.0 mol of sodium chloride dissolved in 0.5 L of solution. What is the molarity?

M = 2.0 mol ÷ 0.5 L = 4.0 M

The molarity of the solution is 4.0 M.

Practice Question

A solution contains 3 mol of solute in 1.5 L of solution. What is the molarity?