Chemistry calculators
Molar mass, moles, molarity, dilution, pH, gas laws and half-life. Free, instant and with the working shown.
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
All 10 tools
- Molar Mass CalculatorFind the molar mass of any compound from its formula and see the mass of each element.
- Moles CalculatorConvert between grams and moles, with particle count from Avogadro's constant.
- Molarity CalculatorCalculate molarity, moles of solute or solution volume.
- Dilution Calculator (C1V1 = C2V2)Work out how much stock solution and solvent you need to reach a target concentration.
- Ideal Gas Law CalculatorSolve PV = nRT for pressure, volume, moles or temperature.
- pH CalculatorConvert between pH, pOH, hydrogen and hydroxide ion concentration.
- Half-Life CalculatorFind amount remaining, time elapsed or half-life for radioactive decay and other first-order processes.
- Percent Yield CalculatorCompare the actual yield of a reaction with the theoretical yield.
- PPM CalculatorConvert between parts per million, mg/L and percent.
- Titration CalculatorFind the volume of base needed to neutralise an acid at the equivalence point.