Percentage Calculator
Calculate percentage values, percentage increase, and discount margins.
What is % of ?
100
About This Tool
A fast way to answer everyday percentage questions — what is X% of Y, how much a price drops after a discount, or how much a value has grown — without doing the arithmetic by hand.
How to Use Percentage Calculator
- Enter the percentage value.
- Enter the number you want the percentage of.
- The result updates live as you type.
Frequently Asked Questions
How do I calculate a discount price?
Enter the discount percentage and the original price — the result shows the discount amount; subtract it from the original price for the final sale price.
How is percentage increase calculated?
Percentage increase = ((new value − old value) / old value) × 100. This tool handles the basic percent-of-number case; use the value directly for increase/decrease comparisons.