Chemistry Calculators
Free online chemistry calculators for students, teachers, and lab work. Calculate molar mass, moles, molarity, molality, mole fraction, percent error, half-life, and convert between grams, atoms, liters, and moles.
- Molar Mass Calculator — Find the molar mass (molecular weight) of any chemical formula in g/mol.
- Mole Calculator — Calculate moles from mass and molar mass, plus the number of particles.
- Grams to Moles Calculator — Convert a mass in grams to an amount in moles using molar mass.
- Atoms to Moles Calculator — Convert atoms or particles to moles and back with Avogadro's number.
- Liters to Moles Calculator — Convert liters of a gas at STP to moles using the molar volume.
- mg/L to PPM Converter — Convert mg/L to ppm and back using solution density.
- Molarity Calculator — Calculate molarity (mol/L) from moles or mass and solution volume.
- Molality Calculator — Calculate molality (mol/kg) from moles or mass and mass of solvent.
- Mole Fraction Calculator — Find the mole fraction of each component in a mixture.
- Percent Error Calculator — Calculate percent error from experimental and theoretical values.
- Half-Life Calculator — Find the remaining quantity of a decaying substance over time.