Chemistry calculators

7 free chemistry tools, each with the formula and step-by-step working.

• Calorimetry Calculatorq = mcΔT heat transfer for any sample.
• Combined Gas Law CalculatorSolve P₁V₁/T₁ = P₂V₂/T₂ for any missing value.
• Gibbs Free Energy CalculatorΔG from enthalpy, temperature and entropy — with spontaneity.
• Hess's Law CalculatorAdd reaction steps to get the overall enthalpy change.
• Ideal Gas Law CalculatorSolve PV = nRT for any unknown.
• pH CalculatorpH, pOH and ion concentrations.
• Solubility CalculatorGrams per 100 mL, molar solubility and saturation check.

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