This Percentage Calculator helps you solve multiple types of percentage problems quickly and easily.
Unlike a basic percentage calculator that works on only one formula, this tool allows you to calculate percentage values, percentage increase or decrease, and compare numbers using percentages — all in one place.
The calculator updates results instantly as you type, making it useful for students, teachers, business users, and everyday calculations.
Each row in the calculator performs a different percentage calculation.
Simply enter numbers in the input boxes, and the result will appear automatically.
Enter the percentage in the first box
Enter the number in the second box
The calculator shows how much X percent of Y is
Example:
50% of 80 = 40
Enter the original number
Enter the percentage to subtract
The result shows the value after percentage reduction
Example:
100 − 75% = 25
Enter the original number
Enter the percentage to add
The calculator shows the increased value
Example:
50 + 80% = 90
Enter the smaller number
Enter the larger number
The calculator shows what percent the first number is of the second
Example:
60 is what percent of 80 = 75%
Enter the final result value
Enter the percentage
The calculator finds the original number
Example:
50 is what 50% of what = 100
Results update automatically as you type
No submit or calculate button needed
Supports whole numbers and decimals
Works on mobile, tablet, and desktop devices