Discount Calculator
Free discount calculator: enter the original price and discount percent to get the sale price and exactly how much money you save on every purchase.
About this tool
Sale signs are designed to make you feel like you are winning, but '25% off' is meaningless until you see the final price. A discount calculator does the mental math for you: the exact amount knocked off and the price you will actually pay.
It is also the fastest way to compare deals. Is 30% off $120 better than $40 off $150? Your brain guesses; the calculator knows. Shoppers who check the real numbers consistently spend less for the same basket.
How to use
Type in the original (pre-sale) price and the discount percentage from the tag or listing, then press Calculate Discount.
You instantly see the discount amount in dollars, the final sale price, and your total savings. Use it in-store before you reach the register, or stack two offers - for example 20% off plus an extra 10% - by running the sale price through the tool a second time.
The math behind it
Discount amount = original price x (discount percent / 100). Sale price = original price - discount amount. Note that stacked discounts multiply, they do not add: 20% then 10% off $100 is $72, not $70, because the second discount applies to the already-reduced $80.
Sales tax, where applicable, is charged on the discounted price in most places - another small win the sticker never mentions.
Frequently asked questions
How do I calculate 20% off quickly in my head?
Do stacked discounts add up?
Is the discount applied before or after tax?
Related tools
💬 Comments
Have a question about this page, or an idea to make it better? Share it below — your feedback helps everyone who uses this site.