Percentage increase calculator
Calculate the change between two values.
Percentage increase calculator
Your result appears here
Adjust the values to see your result automatically.
How to use Percentage increase calculator
The Percentage increase calculator takes an original value and a new value and returns the percentage change and the raw difference between them. The formula is (new − original) / |original| × 100, so a negative result means a decrease. Using the absolute starting value keeps the sign meaningful even when the original number is negative.
- Adjust the values; an initial result is calculated from the defaults.
- Change the basic settings or open Advanced mode to fine-tune the result.
- Review and copy or download your result. Pause Live results to run manually. Sources or individual settings above 20,000 characters require an explicit run.
What this tool supports
Calculate the change between two values.
- Original value
- Set this value for your task.
- New value
- Set this value for your task.
Limits and processing
Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.
Frequently asked questions
How do I calculate a percentage increase?
Subtract the original value from the new value, divide by the absolute original value and multiply by 100. Going from 100 to 125 gives (125 − 100) / 100 × 100 = 25%. The calculator also shows the difference of 25.
How does the calculator handle a percentage decrease?
The same formula is used, so a decrease appears as a negative change. Going from 125 to 100 is (100 − 125) / 125 × 100 = −20%, not −25%, because the starting value is the denominator.
Why can't I calculate a change from zero?
Percentage change divides by the original value, and dividing by zero is undefined. When the original value is 0, the calculator returns an error instead of a misleading percentage. The new value can be zero.
Where is my input processed?
This operation processes its source in your browser. Copy and download are explicit actions; source input is not saved in an account or history.
What are the input limits?
Use finite numbers, valid dates and the ranges shown by each control. Invalid values produce an error without a downloadable result.