pH計算機

計算する 計算中…

リセット 印刷

共有リンク

はじめに

pH Calculator — Convert between pH and [H⁺] with acidity classification. Enter Given, [H⁺] (mol/L) to get an instant, accurate result.

計算式

pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH).

ステップごとの説明

1. Enter the Given.
2. Enter the [H⁺] (mol/L).
3. Click Calculate to see your result instantly.

実例

Example: With Given = from_h, [H⁺] (mol/L) = 0.00001, the pH Calculator gives pH: 5, H Concentration: 0.00001, Acidity: Acidic.

よくある質問

What pH values are acidic vs. basic?

Below 7 is acidic, 7 is neutral, and above 7 is basic (alkaline).

What does [H⁺] mean?

The molar concentration of hydrogen ions in solution, expressed in mol/L.

What inputs does the pH Calculator need?

You'll need to provide: Given, [H⁺] (mol/L). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the pH Calculator?

The pH Calculator applies the formula exactly as calculated — pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the pH Calculator free to use?

Yes, the pH Calculator is completely free, requires no signup, and runs instantly in your browser.

pH計算機について

The pH Calculator uses a real, verifiable formula — pH = −log₁₀[H⁺]. Conversely, [H⁺] = 10^(−pH). — so results are accurate every time, not an approximation.