Discount Calculator
Enter the original price and one or two stacked discounts to see the final price and total savings.
Why two 20% discounts aren't 40% off
Stacked discounts apply one after the other, each on the already-reduced price — so 20% off followed by another 20% off works out to a 36% total discount, not 40%. This calculator shows that effective combined percentage.
About the Discount Calculator
The Discount Calculator shows the sale price after a percentage discount, and lets you stack a second discount that is applied after the first. It also shows exactly how much money you save, which makes shopping offers and sale banners easier to compare.
A single discount reduces the price by price times percentage divided by 100. When two discounts are stacked, the second applies to the already reduced price, so 20 percent followed by 10 percent is a total reduction of 28 percent, not 30. Always check whether a store applies multiple coupons on the original price or one after another.
How to use it
- Enter the original price.
- Enter the first discount percentage.
- Optionally enter a second discount.
- Read the final price and the amount saved.
Tips and good to know
- Compare the final price per unit, not just the headline percentage.
- Taxes such as GST or VAT may be added before or after the discount depending on the country.
- A discount of 50 percent followed by another 50 percent is 75 percent off in total.
Frequently asked questions
How do I find the original price from a sale price?
Divide the sale price by one minus the discount rate, or use the Percentage Calculator.
Why is 20% plus 10% not 30%?
The second discount is calculated on the lower price.
Does it include tax?
No. Add tax separately.