About the Discount Calculator
The Discount Calculator shows what you will pay after a percentage off, and how much money the discount saves. Use it while shopping to compare offers, or when setting your own sale prices.
The sale price is calculated as original price × (1 − discount ÷ 100). The discount must be between 0 and 100 percent; otherwise the tool asks you to check the values.
How to use it
- Enter the Original price.
- Enter the Discount (%).
- Read the sale price and the amount saved.
Things to remember
A quick mental shortcut is to find 10 percent by moving the decimal point one place, then add or subtract multiples of it. For example, 30 percent off 80 is 3 × 8 = 24 off, so you pay 56.
Two stacked discounts do not add up. 20% off then 10% off equals 28% off in total, not 30%, because the second applies to the reduced price.
Taxes or delivery fees are not included in this tool.
Compare the final price rather than the headline percentage.
Real-world examples
Shopping. A 30 percent sale on a 120 jacket costs 84, saving 36.
Setting your own sale. Work out what a 15 percent promo does to your margin.
Comparing offers. 25 percent off 80 costs 60, while 15 percent off 70 costs 59.50, so the smaller discount is actually cheaper. Compare final prices, not percentages.
Common mistakes
Adding two discounts together instead of multiplying: 20 percent then 10 percent is 28 percent, not 30. Forgetting that tax or delivery may be added after the discount. Judging by the percentage alone rather than the final price.
How it works
Sale price = original × (1 − discount ÷ 100), and savings = original × discount ÷ 100. Values outside the sensible range (negative prices, discounts above 100 percent) show 'Check values' instead of a result.
Frequently asked questions
Does it include tax?
No.
Which currency?
Any; the tool uses plain numbers.
Can the discount be over 100%?
No.