pH to Voltage Calculator

Convert pH measurements to voltage outputs using the Nernst equation for electrochemical measurements

Input Parameters

Default is 25°C (room temperature)

Default is 0 mV (Ag/AgCl reference)

Calculation Results

Calculation Formula

V = E₀ - (0.05916 × T / 25) × pH

Where:
V = Voltage (mV)
E₀ = Standard electrode potential (mV)
T = Temperature (°C)
pH = pH value

Calculated Voltage

-- mV

Voltage output based on input pH and parameters

Accuracy Note

This calculator provides approximate voltage values. For precise measurements, consider electrode calibration and temperature compensation in your actual equipment.

pH to Voltage Calculator Calculator Usage Guide

Learn how to use the pH to Voltage Calculator and its working principles

How to Use This Calculator

  1. Enter the pH value you want to convert. For example, enter 7.0 for neutral pH.
  2. Set the temperature in Celsius. The default is 25°C, which is room temperature.
  3. Enter the standard electrode potential in millivolts (mV). This is typically 0 mV for an Ag/AgCl reference electrode, but may vary depending on your specific measurement setup.
  4. Click the "Calculate" button to compute the corresponding voltage.
  5. The result will be displayed in millivolts (mV).

Working Principle

This calculator uses the Nernst equation to convert pH values to voltage measurements. The relationship between pH and voltage is logarithmic, meaning small changes in pH can result in significant voltage changes.

The Nernst equation used is:
V = E₀ - (0.05916 × T / 25) × pH

Where:
V = Voltage in millivolts (mV)
E₀ = Standard electrode potential in millivolts (mV)
T = Temperature in degrees Celsius (°C)
pH = pH value

Important Considerations

  • The accuracy of this calculation depends on the precision of your input values.
  • Electrochemical measurements are temperature-sensitive. For accurate results, ensure your temperature measurements are accurate.
  • Real-world measurements may require additional corrections for electrode drift, reference electrode potential variations, and other factors not accounted for in this simple calculator.
  • This calculator is most accurate for measurements within the standard pH range of 0 to 14.