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Molarity Calculator

Calculate molar concentration (molarity, M) of a solution from moles of solute and total solution volume in litres. The most common concentration unit in chemistry, essential for stoichiometry, titrations, dilutions, and any lab calculation involving solutions.

Moles of solute (mol)

Volume of solution (L)

Chemistry

Molecular Weight Calculator

Compute the molecular weight (molar mass, g/mol) of a CHON-containing molecule from the number of carbon, hydrogen, oxygen, and nitrogen atoms in its formula, with an optional isotope-correction factor. Useful for routine stoichiometry on organic and biological molecules where C, H, O, and N dominate the elemental composition.

Carbon Atoms (C) (atoms)

Hydrogen Atoms (H) (atoms)

Oxygen Atoms (O) (atoms)

Nitrogen Atoms (N) (atoms)

Isotope Correction

Key differences

	Molarity Calculator	Molecular Weight Calculator
Category	Chemistry	Chemistry
Inputs required	2	5
Result	Molarity (M)	Molecular Weight (g/mol)
What it does	Calculate molar concentration (molarity, M) of a solution from moles of solute and total solution volume in litres. The most common concentration unit in chemistry, essential for stoichiometry, titrations, dilutions, and any lab calculation involving solutions.	Compute the molecular weight (molar mass, g/mol) of a CHON-containing molecule from the number of carbon, hydrogen, oxygen, and nitrogen atoms in its formula, with an optional isotope-correction factor. Useful for routine stoichiometry on organic and biological molecules where C, H, O, and N dominate the elemental composition.