Percentage Change Calculator
Calculate increase or decrease between two values
About the Percentage Change Calculator
The ToolsVera percentage change calculator tells you how much a value increased or decreased relative to its starting point. It is ideal for comparing sales, stock prices, weight loss progress and before/after metrics of any kind.
How to use the Percentage Change Calculator
- Enter the original value: Type the starting number.
- Enter the new value: Type the updated number.
- See the percent change: Increase or decrease displays with a sign.
Why use our Percentage Change Calculator?
- Clear positive/negative result.
- Works for prices, weights, scores — anything.
- No signup, no tracking.
- Super fast for quick business math.
Frequently Asked Questions
Is this Percentage Change Calculator really free?
Yes. Percentage Change Calculator on ToolsVera is 100% free to use with no signup, no hidden limits and no watermark added to your output.
What if the original value is zero?
Percent change is undefined when dividing by zero. Use a small baseline or a different metric.
Is percent change the same as percent difference?
No. Percent change is relative to the original value; percent difference divides by the average of the two values.
Can the result be more than 100%?
Yes — if a value more than doubles, percent increase exceeds 100%.
Is my data safe?
Yes. Files are processed on the server and automatically deleted — we never store your content.