Percentage calculator
Calculate a percentage of a value or the change from a baseline.
01 / Your input
02 / Your result
Your result will appear here.
How to use this tool
- Enter your own values, or select Load example to restore the demonstration inputs.
- Review Percentage or original value, Value or new value, Operation before selecting Run tool.
- Inspect the result, then copy it or download the generated file. Changing inputs clears the previous result.
Processing happens in this browser. Inputs are not uploaded or saved by the tool. Reset clears the result and restores the default settings.
Example and expected result
From 80 to 100 is a 25% increase; 80% of 100 is 80.
Limits and interpretation
Percent change requires a positive original value. Percentage points are a separate measure.