pH / pOH Converter

Enter one value (pH, pOH, [H⁺], or [OH⁻]) and calculate the rest (at 25°C, using pH + pOH = 14).

Choose what you want to enter.
Typical pH range is 0–14.
pH = −log₁₀[H⁺]
pOH = −log₁₀[OH⁻]
pH + pOH = 14 (25°C)
Concentrations are in mol/L.