Percentage Calculator is a free tool for solving three common percentage scenarios in seconds: finding a percentage of a number, finding what percent one number is of another, and finding what number a value is a given percentage of. It's useful for discount math, grading, tipping, or budget planning. Enter your numbers and see the result instantly.
How to Use It
- Choose a calculation mode.
- Enter the relevant numbers.
- See the result instantly below.
Use Cases
- Calculating a discounted price or discount rate
- Finding the percentage a score or grade represents
- Calculating a tip amount
- Comparing budget or spending ratios
Frequently Asked Questions
How many calculation modes are there?
Three: finding a percentage of a number, finding what percent X is of Y, and finding what number a value is a percentage of.
Can I enter negative numbers?
Yes, the tool produces correct results with negative values too.
When does the result update?
Instantly as you type — no button required.
Is my data saved anywhere?
No, all calculations happen in your browser; nothing is stored.