Percentage Change Calculator
Calculate percentage increase or decrease between two values. Includes reverse calculator to find the original value from a percentage change. All processing is client-side.
29.0Kuses
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Enter old and new values to see the percentage change.
How to Calculate Percentage Change
- Enter the old (original) value and the new value.
- The calculator shows the percentage increase or decrease automatically.
- Switch to Reverse mode to find the original value from a percentage change.
Percentage Change Formula
Percentage Change = ((New Value - Old Value) / |Old Value|) x 100. A positive result indicates an increase, while a negative result indicates a decrease.
Features
- Calculate percentage increase or decrease
- Show the formula with your values
- Reverse calculator: find original from percentage change
- Copy results to clipboard
- 100% client-side processing
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Disclaimer: This tool is provided as-is for informational and educational purposes only.