Chemistry and Biology Calculators
Free calculators and converters for the lab and the classroom: molarity, molecular weight, buffers, centrifuge RCF, PCR master mix and more.
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The calculators people use most.
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Chemistry
Moles, solutions, gases and atomic structure.
- Avogadro’s NumberConvert between moles, particles and mass.
- Equation BalancerBalance an equation and check the atom counts.
- DensityDensity, mass or volume from the other two.
- Electron ConfigurationOrbital filling and notation for any element.
- Grams to MolesGrams to moles and back, by molar mass.
- Half-LifeAmount remaining, time elapsed or half-life.
- Ideal Gas LawSolve PV = nRT for any one variable.
- KspKsp from solubility, or solubility from Ksp.
- MolarityMass, volume and concentration of a solution.
- Molecular WeightMolar mass of a formula or a protein sequence.
- Percent YieldActual over theoretical yield, as a percentage.
- pH ScalepH, pOH and ion concentrations, on the pH scale.
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Lab and molecular biology
Dilutions, spins, PCR and cell culture at the bench.
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