CHEMISTRY TOOLS

Professional Chemistry Calculator

Fast, simple and secure chemistry calculations. All calculations are performed locally in your browser.

✓ No Login ✓ No Database ✓ No Data Storage

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CONCENTRATION

Concentration Converter

Convert between molar, mass-based and percentage concentration units.

Concentration

From Unit

To Unit

Molecular Weight (g/mol)

Required when converting between molar and mass-based units.

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SOLUTION PREPARATION

Calculate the mass of chemical required to prepare a solution of known concentration and volume.

Target Molarity (mol/L)

Final Volume (mL)

Molecular Weight (g/mol)

Purity / Assay (%)

Formula Mass = M × V × MW ÷ Purity

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DILUTION

Calculate concentration, stock volume and solvent volume using C₁V₁ = C₂V₂.

Stock Concentration (C₁)

Stock Volume (V₁, mL)

Leave blank to calculate required stock volume.

Final Concentration (C₂)

Final Volume (V₂, mL)

Formula C₁V₁ = C₂V₂

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MOLECULAR WEIGHT

Calculate molecular weight from a chemical formula.

Chemical Formula

Examples: H2SO4, KMnO4, CaCl2, Al2(SO4)3, CuSO4·5H2O