The pOH Calculator is an easy-to-use chemistry tool that helps you calculate the pOH of a solution based on either its pH or hydroxide ion concentration [OH⁻]. It instantly determines the relationship between pH, pOH, [H⁺], and [OH⁻], helping students and chemists understand acid-base balance in aqueous solutions. This calculator follows the fundamental formula pOH + pH = 14 (at 25°C), making it perfect for solving equilibrium and concentration problems in chemistry. Whether you are studying strong acids, strong bases, or neutral solutions, this tool provides fast and accurate results for all your acid-base calculations.