pH Calculator
Use this ph calculator to calculate pH, hydrogen ion concentration or hydroxide concentration. Enter the concentration or pH value requested by the tool and review the matching acidity or alkalinity measure.
Result
—
Classification —
✉ Email me this result
</> Embed this calculator
Paste this into any website or blog post. It is free — the small "powered by" link must stay visible.
How it works
pH = −log₁₀[H⁺]; [H⁺] = 10⁻ᵖᴴHow to use the pH Calculator
Start by entering the concentration or pH value requested by the tool. Keep the units consistent and check that each value belongs to the same question.
The result gives the matching acidity or alkalinity measure. Use consistent concentration units and remember that pH is logarithmic. Use it as a guide and check any instructions, rules or professional advice that apply.
Frequently Asked Questions
What does this ph calculator calculate?
It gives the matching acidity or alkalinity measure. Use consistent concentration units and remember that pH is logarithmic.
What information should I enter?
Enter the concentration or pH value requested by the tool. Use the same units throughout so the result is easier to understand.
What does pH measure?
pH describes the acidity or alkalinity of an aqueous solution on a logarithmic scale.