Chemistry Calculators and Tools

Interactive calculators for the math that comes up most in chemistry class and in the lab. Each one shows its working, explains the formula, and walks through an example.

• Molarity Calculator

  Find molarity, moles, volume, or the mass to weigh out.

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• Dilution Calculator

  Solve C1V1 = C2V2 and see how much solvent to add.

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• Molar Mass Calculator

  Type a formula and get its molar mass, element by element.

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• pH Calculator

  Convert pH, pOH, and ion concentrations, or work out the pH of an acid or base.

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• Ideal Gas Law Calculator

  Solve PV = nRT for pressure, volume, moles, or temperature.

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• Stoichiometry Calculator

  Convert between two substances using a balanced equation.

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• Percent Yield Calculator

  Compare what a reaction produced with what it should have.

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• Empirical Formula Calculator

  Turn percent composition into an empirical and molecular formula.

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• Percent Composition Calculator

  See what share of a compound’s mass each element contributes.

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• Density Calculator

  Solve density, mass, or volume, with units converted for you.

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• Mole Calculator

  Find moles, mass, or molar mass using n = m ÷ M.

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• Celsius to Fahrenheit Calculator

  Convert between the two temperature scales.

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