Free Percentage Calculator
The three everyday percentage problems, solved on one page.
How to use the Percentage Calculator
- Pick the problem that matches your question — percent of a number, percent share, or percent change.
- Type the two numbers and click Calculate.
- The answer appears instantly under each form.
Good to know
- Results are rounded to two decimal places.
- Percent change is measured against the starting value, the standard convention.
Frequently asked questions
How do I calculate a discount?
Use the first form: 25% of the price is the discount amount. Subtract it from the price to get the sale price.
How do I find a percent increase, like a raise?
Use the third form with your old salary as From and the new salary as To.