Chemistry & units
pH and hydrogen ion calculator
Convert between pH and hydrogen ion concentration, and see what a given pH change actually means.
Result
Hydrogen ion concentration
1.000e-7mol/l
Hydroxide ion concentration
1.000e-7mol/l
Character
Approximately neutral
Compared with pH 8.1
12.6× more acidic
Each whole pH unit is a tenfold change in hydrogen ion activity.
Method
pH = −log₁₀[H⁺], so [H⁺] = 10^(−pH). The ratio between two pH values is 10^(difference).