Percentage Calculator
Four calculation modes with clear results
Original: — → Decreased: —
About the Percentage Calculator
The Percentage Calculator covers the four most common percentage problems in one tool: finding what X% of Y is, working out what percentage X is of Y, calculating percentage change between two values, and applying an increase or decrease by a percentage.
How to Calculate a Percentage
- Choose the calculation mode you need from the tabs.
- Enter your values into the fields.
- See the result and explanation appear instantly.
Key Features
- Four calculation modes in one tool
- Clear, plain-language result explanations
- Instant, real-time results
- Handles both percentage increase and decrease
FAQ
Which percentage calculations can I do here?
You can find X% of Y, determine what percent X is of Y, calculate percentage change, and apply an increase or decrease.
What's the difference between % change and increase/decrease modes?
% Change tells you the percentage difference between two values, while Increase/Decrease applies a percentage to a starting value to get a new result.
Can I use negative numbers?
Yes, negative values are supported where they make sense, such as in percentage change.
Is my data stored anywhere?
No, all calculations happen entirely in your browser.