What does the Molarity Calculator work out?

Molar concentration from mass, molar mass and volume. It is one of the Everyday & Tech tools on Mondo Knows.

How is the Molarity Calculator calculated?

The maths is short enough to check by hand: M = (mass / molar mass) / volume (L).

Do I need to sign up, and is my data stored?

No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

Mondo Knows Tools

Molarity Calculator

Molar concentration from mass, molar mass and volume. Use the free molarity calculator below to get an instant answer, with the formula shown so you can check the maths and trust the result. Free, private, and no sign-up.

Mass of solute

Molar mass

g/mol

Volume of solution

Mondo says

Molarity

1 M

Moles of solute1

Millimolar1,000 mM

The formula

M = (mass / molar mass) / volume (L)

Molarity Calculator: common questions

What does the Molarity Calculator work out?: Molar concentration from mass, molar mass and volume. It is one of the Everyday & Tech tools on Mondo Knows.
How is the Molarity Calculator calculated?: The maths is short enough to check by hand: M = (mass / molar mass) / volume (L).
Do I need to sign up, and is my data stored?: No sign-up, and nothing you type is sent anywhere. The calculation runs in your own browser, so the figures stay on your device and the page works offline once loaded.

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Facts that connect to the molarity calculator

Short, sourced facts that point back to this tool.

Osmosis drives water through membranes toward higher solute concentrationSolute gradients push solvent molecules to equalize concentrations across barriers Enzymes act as highly specific biological catalystsActive site shapes fit target substrates precisely to accelerate vital biochemical reactions The mole standardizes chemical substance amounts for reactionsCounting atoms in moles enables balanced stoichiometric calculations in chemistry Hydrofluoric acid dissolves glass by attacking silicon dioxideFluoride ions react with silica to convert hard glass into soluble fluorosilicic acid

Estimates for general guidance only. This is not financial, medical or legal advice. Everything runs in your browser and nothing you type is stored.