Percentage Change Calculator

Find the percentage increase or decrease between two numbers.

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Percentage Change

Enter both values to see the change.

What does this tool do?

This calculator finds the percentage increase or decrease from an old value to a new value, showing the difference and whether it went up or down. Free and instant, in your browser.

How to use Percentage Change Calculator - Free Online Tool

  1. Enter the original (old) value.
  2. Enter the new value.
  3. The percentage change is shown instantly, with direction.
  4. Copy the result if needed.

Example

From 200 to 250:

Before

Old New
200 250

After

Change
+25% increase

(250 − 200) ÷ 200 × 100 = 25%.

Excel formula alternative

Prefer a formula? You can achieve a similar result with percentage change:

change = (new - old) / old * 100

In Excel: =(B2-A2)/A2. This tool shows the increase or decrease instantly.

When should I use this tool?

Measuring sales growth month over month
Tracking price changes
Comparing this year vs last year
Calculating salary hikes
Reporting KPI movement
Analyzing trends

Frequently Asked Questions

Subtract the old value from the new value, divide by the old value, and multiply by 100. A positive result is an increase; negative is a decrease.

Percentage change from zero is undefined mathematically, so the tool flags it rather than showing a misleading number.

No. Everything runs in your browser.

Yes, it clearly labels the direction of the change.

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