Percentage Change Calculator

Quantify the change from an old value to a new value.

Percentage Change = \frac{(New Value - Old Value)}{| Old Value |} \times 100

Old Value (V1):

New Value (V2):

Result:

Understanding Percentage Change

The percentage change calculator is a simple tool used to determine the magnitude of a change from an initial value (V1) to a final value (V2) in terms of a percentage. This is a fundamental calculation in finance, statistics, and everyday life to understand increases or decreases.

The Formula

The formula for percentage change is:

Percentage Change = \frac{(New Value - Old Value)}{| Old Value |} \times 100

Where:

V1 is the Old Value (the starting number).
V2 is the New Value (the ending number).
|V1| is the absolute value of the Old Value, ensuring the result is always a change relative to the initial magnitude.

How It Works

This calculator operates entirely client-side, meaning all calculations are performed securely in your browser and no data is sent to a server. When you click 'Calculate', the tool takes your two numerical inputs, applies the percentage change formula, and displays the result. It will also tell you if the change is an increase or a decrease. If the old value is 0, it will alert you that a division by zero is not possible.