May 24, 2025 | UR Gate

pH & pOH Calculator – Online Hydrogen Ion Concentration Tool

Accurate online pH & pOH calculator to determine the acidity or alkalinity of a solution. Enter acid or base concentration and instantly get pH, pOH, and solution type. Simple, fast, and mobile-friendly.

Use this smart and easy-to-use pH and pOH calculator to instantly determine the hydrogen ion (H⁺) or hydroxide ion (OH⁻) concentration of a solution. Just enter the acid or base concentration, and get the corresponding pH, pOH, and solution type (acidic, neutral, or basic) — all in real-time.

pH & pOH Calculator

Concentration (mol/L):

Substance Type: Strong Acid Strong Base

✅ Key Features of the pH & pOH Calculator Tool:

🧪 Dual Support: Calculate pH from acid concentration or pOH from base concentration.
🔄 Automatic Calculation: Instantly switches between acid and base modes.
🧠 Smart Classification: Automatically identifies the solution type (acidic, neutral, or basic).
📈 Visual pH Scale: Simple pH strip visualization (0 to 14) with color gradient.
✅ Error Validation: Prevents negative or invalid inputs.
🧮 Logarithmic Calculation: Uses pH = -log[H⁺] and pOH = -log[OH⁻], with pH + pOH = 14.
📋 Copy to Clipboard: One-click to copy the result.
🔄 Reset Function: Easily clear all fields for new calculations.
📱 Responsive UI: Works perfectly on both desktop and mobile devices.