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Molarity Calculator

Moles divided by solution volume.

Choose the molarity unknownUse moles directly or solve the mass–molecular-weight–volume–concentration relationship in practical units.
5 options
MOLARITY0.25 mol/L

moles ÷ solution liters

Estimate based on the values shown
Formula checkedMoles = mass ÷ molecular weight; molarity = moles ÷ liters. Every selected unit is normalized to grams, liters, g/mol, and mol/L before solving.