How it works
- 1Choose the percentage calculation you need.
- 2Enter the two values shown for that calculation.
- 3Calculate and copy the formatted result.
← All tools
BROWSER · Local JavaScript percentage formulas
I need to calculate Percentage
Percentage Calculator
Calculate percentages, percentage increase/decrease, change and difference. Solve what X% of Y is or what percent one number is of another.
✓ Five common percentage calculations in one tool✓ Percentage increase, decrease, change and difference✓ Natural number inputs with instant formatted results
Result90
About this tool
A free browser percentage calculator covering the most common percent formulas in one page.
Common uses
percent calculatorpercentage increasepercentage decreasepercentage change
TOOL GUIDE
Percentage Calculator: practical guide
Calculate percentages, percentage increase/decrease, change and difference. Solve what X% of Y is or what percent one number is of another.
The workflow is designed for browser-based use, so you can complete the task without installing a desktop application.
When is this useful?
- Finding X percent of a number
- Calculating percentage increase or decrease
- Comparing percentage change between two values
- Calculating percentage difference when neither value is the original reference
How to use it
- Choose the percentage calculation type.
- Enter the two required values.
- Calculate the result.
- Copy or reuse the formatted value.
Good to know
No. Percentage change uses the original value as the reference; percentage difference uses the average magnitude of two values.
Frequently asked questions
What calculations are included?
The tool calculates X% of Y, X as a percent of Y, percentage change, percentage difference, and increasing or decreasing a value by a percent.
Is percentage change the same as percentage difference?
No. Percentage change uses the original value as the reference; percentage difference uses the average magnitude of two values.
Is data sent to a server?
No. All calculations run locally in your browser.