# pH Calculator

> Convert between pH, pOH, hydrogen ion concentration, and hydroxide ion concentration using pH = -log10[H+] and pH + pOH = 14 (at 25 C). Educational chemistry only.

**URL:** https://www.calculatoranswers.com/ph-calculator
**Category:** Education

## Quick Answer

Convert between pH, pOH, hydrogen, and hydroxide ion concentrations. Enter any one of these values to find the others.

## Definition

The pH scale measures the acidity or basicity of an aqueous solution by representing the negative logarithm of the hydrogen ion concentration. A pH calculator converts between pH, pOH, hydrogen ion concentration, and hydroxide ion concentration using logarithmic equations and the constant pH + pOH = 14. Scientists, water treatment technicians, and students use these calculations to analyze chemical solutions, monitor soil quality, and evaluate chemical safety without performing manual logarithmic conversions.

## How to Use

1. **Select input metric** — Choose which concentration or value you want to input, such as pH or hydrogen ion concentration.
2. **Enter the value** — Type the numeric value of your chosen metric into the input field.
3. **Review chemical properties** — Read the computed pH, pOH, ion concentrations, and whether the solution is acidic, basic, or neutral.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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