Percentage Change Calculator
Compute the percentage increase or decrease between two values. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
100 → 150
Example Output
50% increase
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the Percentage Change Calculator
The Percentage Change Calculator computes the relative change from an original value to a new value, expressed as a percent, plus the direction (up/down) and absolute difference. Formula: (new − original) / |original| × 100.
Useful for growth analysis, price comparisons, and business metrics.
FAQ
Is this Percentage Change Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.