Chemistry Calculators

Calculate pH, pOH, [H⁺], and [OH⁻] from any one input. Includes a live colour-coded pH scale from 0 (strongly acidic) to 14 (strongly alkaline).

Solve PV = nRT for pressure, volume, moles, or temperature. Supports atm, kPa, mmHg, bar, psi, litres, mL, m³, Kelvin, Celsius, and Fahrenheit.

Solve C₁V₁ = C₂V₂ for any of the four variables, with molar or mass concentration units, multiple volume units, and a serial-dilution schedule.

Solve stoichiometry problems from any balanced equation: convert mass, moles, particles, solution volume, or gas volume between reactants and products with a step-by-step working log.

Calculate percent yield, actual yield, or theoretical yield for any chemical reaction, with efficiency rating and over-100% warnings.

Balance any chemical equation instantly using the algebraic null-space method, with an atom count verification table.

Find the limiting reactant, theoretical yield, and excess reactants left over from any balanced reaction.

Solve q = m·c·ΔT for heat, mass, specific heat, or temperature change, with material presets and full unit conversions.