Everyday Calculators › Chemistry
Chemistry calculators
7 free calculators for the everyday maths of chemistry class and the lab: from a formula's molar mass to solution concentrations, pH and gas laws. Type your values and the answer appears instantly. Nothing to install and no sign-up.
- Molar mass calculatorAdd up atomic masses from a chemical formula to get grams per mole.
- Moles & particles calculatorConvert between mass, moles and number of particles using Avogadro's number.
- Molarity calculatorFind the concentration of a solution in moles per litre.
- Dilution (C1V1 = C2V2) calculatorWork out the volume or concentration you need when diluting a stock solution.
- pH calculatorMove between pH, pOH and hydrogen or hydroxide ion concentration.
- Ideal gas law calculatorSolve PV = nRT for pressure, volume, amount or temperature.
- Half-life calculatorSee how much of a radioactive or decaying substance remains after a given time.
Which one do I need?
Starting from a formula? Use the molar mass calculator first, then moles and particles to convert grams into moles. Preparing a solution? Molarity gives the concentration, and dilution tells you how much stock to use. For acids and bases use pH; for gases use the ideal gas law; for decay problems use half-life.