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Percentage Calculator
Use this free percentage calculator for percent-of calculations, percentage change, percentage increase or decrease, discounts, markups, and reverse percentage questions.
Percent of Percentage change Discounts and markups Reverse percent
Percent of a number
Find answers like 20% of 80.
20% of 8016
80 x 20 / 100
Steps
- Turn 20% into 0.2.
- Multiply 80 by 0.2.
- The answer is 16.
How to use the percentage calculator
- Choose the percentage question you want to answer.
- Enter the values for percent-of, what-percent, percentage change, adjustment, or reverse percentage.
- Press Calculate percentage to see the answer, formula, and steps.
- Use examples, recent answers, or copy answer while you compare values.
Common uses
Find a discount, tip, tax amount, sale price, or markup.
Calculate what percent one number is of another number.
Check percentage increase or decrease between two values.
Work backward from a known value and percentage to find the original whole.
Examples
12.5%
27.5% decrease
Frequently asked questions
Quick answers about percent-of, percentage change, discounts, reverse percentages, and privacy.
What can I use the Percentage Calculator for?
Use it for common percentage questions: percent of a number, what percent one value is of another, percentage increase or decrease, adding or subtracting a percent, and reverse percentage problems.
How do I find a percentage of a number?
Choose Percent of a number, enter the percentage and the value, then calculate. For example, 20% of 80 is 16 because 80 x 0.20 = 16.
How is percentage change calculated?
Percentage change compares the difference between the new value and original value with the original value. The calculator shows whether the result is an increase or decrease.
Can this calculator handle discounts and markups?
Yes. Use Add or subtract percent. Choose Increase for markup, growth, tax, or tip calculations, and Decrease for discounts or reductions.
What is a reverse percentage?
A reverse percentage works backward from a known value and percentage. For example, if 30 is 15% of a number, the original whole is 200.
Is my percentage history private?
Yes. Recent percentage answers stay only in the current browser tab while you use the page. They are not sent to a server.