Molarity Calculator

Solution molarity from moles and volume, with dilution and mass-from-molarity helpers.

Calculator Numbers & Math Updated Apr 20, 2026
How to Use
  1. Enter moles and volume — or mass + molar mass.
  2. Volume accepts mL or L.
Input
Result

Formula

Molarity
M = moles / liters
From mass
moles = mass / molar mass
Units
1 M = 1 mol/L = 1 mmol/mL

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