pH Calculator
⚖ Acids, Bases & Equilibrium. Use the pH formula to find ph, [h⁺]: pick the value you want, type the others, and the answer updates as you go.
pH3
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| pH | no unit |
| [H⁺] | mol/L |
Worked example
Find the ph when [H⁺] = 0.001 mol/L.
Using pH = -log[H^+]: pH = 3.
Frequently asked questions
What is the formula for pH?
pH = -log[H^+].
What do the letters stand for, and what units are used?
pH, [H⁺] in mol/L.
How do you calculate ph?
Put the values into pH = -log[H^+]. For example, with [H⁺] = 0.001 mol/L, ph = 3.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (ph, [h⁺]) and fill in the others: it rearranges the formula for you.
