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pH Calculator
pH = -log₁₀[H⁺]
at 25°C (Kw = 1.0 × 10⁻¹⁴)
Calculation Mode
[H⁺] Concentration
[OH⁻] Concentration
Strong Acid/Base
Weak Acid/Base
[H⁺] Concentration (mol/L)
Scientific notation supported
[OH⁻] Concentration (mol/L)
Scientific notation supported
Chemical Type
Strong Acid (HCl, HNO₃, etc.)
Strong Base (NaOH, KOH, etc.)
Concentration (mol/L)
Chemical Type
Weak Acid
Weak Base
Concentration (mol/L)
Ka (Acid Dissociation Constant)
Example: CH₃COOH Ka = 1.8×10⁻⁵
Kb (Base Dissociation Constant)
Example: NH₃ Kb = 1.8×10⁻⁵
Calculate pH
pH Value:
--
Acidic
Basic
Calculation Details
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