pH / pOH Calculator
Convert between [H⁺], [OH⁻], pH, pOH — Instantly!
pH Scale
0 (Strong Acid)
7 (Neutral)
14 (Strong Base)
Formulas Used:
• pH = -log₁₀[H⁺] • pOH = -log₁₀[OH⁻]
• pH + pOH = 14 • [H⁺] × [OH⁻] = 10⁻¹⁴ (at 25°C)
• pH = -log₁₀[H⁺] • pOH = -log₁₀[OH⁻]
• pH + pOH = 14 • [H⁺] × [OH⁻] = 10⁻¹⁴ (at 25°C)