Percentage and discount calculator
Work out sale prices, tips, tax and increases in a few seconds. Enter an amount and a percentage, pick what you want, and read the answer.
Open the percentage calculator
Three modes
- Percentage of: finds a share of a number, for example 15% of 200.
- Discount price: subtracts the percentage from the amount, which is the price you pay after a sale.
- Add percentage: adds the percentage on top, useful for tax, a tip or a price rise.
How it works
The tool first finds the percentage amount with a simple formula: amount × percentage ÷ 100. Then it either shows that amount, subtracts it, or adds it, depending on the mode you selected. The line under the result repeats your input in words, so you can confirm it read your numbers correctly.
Examples
| Amount | Percentage | Mode | Result |
|---|---|---|---|
| 150 | 20% | Percentage of | 30 |
| 150 | 20% | Discount price | 120 |
| 150 | 20% | Add percentage | 180 |
So a jacket marked 150 with a 20% sale costs 120. A restaurant bill of 150 with a 20% tip comes to 180.
Useful things to know
- Two discounts do not add up. 20% off and then 10% off is 28% off in total, not 30%, because the second discount applies to the already reduced price.
- Finding the original price. If the sale price is 120 after 20% off, divide 120 by 0.80 to get 150.
- Percentage change. To compare an old and a new value, subtract old from new, divide by old and multiply by 100. From 150 to 180 is a 20% increase.
More examples are in our article on how to calculate percentage and discount.
Everyday uses
People use percentages for shop sales, restaurant tips, sales tax or VAT, salary rises and exam marks. If you scored 42 out of 50, divide 42 by 50 and multiply by 100 to get 84%. If your pay rises by 6% on a salary of 400, add 6% to get 424. The same three modes cover almost every case, so once you know which one you need, the answer takes a few seconds.
Frequently asked questions
Can I use decimals, like 7.5%?
Yes. Both the amount and the percentage accept decimals.
Can the percentage be over 100?
Yes. 150% of 80 is 120, and adding 150% to 80 gives 200.
Is my data stored?
No. The calculation runs in your browser only.
Related pages
How to calculate percentage and discount
Formulas and worked examples.
Profit and loss calculator
Check if a sale made money.
Percentage FAQ
14 quick answers.
Related blog posts and countries
Read all how-to posts. Local guides: Pakistan · India · United States.