Discount Calculator: Sale Prices, Stacked Discounts and Price Endings
Is 20% off plus another 10% off the same as 30% off? (It isn't.) Calculate sale prices, stacked discounts and psychological price endings like 99.
Open the free Discount & Sale Price Calculator โWhat is the Discount & Sale Price Calculator?
Sale price after discounts, stacked discounts and psychological price endings. It's completely free, needs no sign-up and works on any phone or computer.

Why it's helpful
- Calculates stacked discounts correctly
- Shows the savings in money and percent
- Suggests price endings for promotions
Who it's for
Shoppers checking deals and shops planning sales like White Friday and Dubai Shopping Festival.
How to use it
- Enter the price and discount. Add a second discount to see the real total (20% + 10% is 28%, not 30%).
๐ป Open source: this tool is free and open source (MIT License). View the code on GitHub, download it and run it offline.
The bigger picture: E-commerce
Online selling in the UAE and GCC is growing fast on Amazon.ae, Noon, Shopify and Salla. Margins are thin, so knowing your real costs, fees and conversion numbers is the difference between growing and quietly losing money.
What's changing: Marketplaces and ad platforms keep raising fees and ad costs, so sellers are focusing more on profit per order, repeat customers and their own stores rather than revenue alone.
Frequently asked questions
Why does 20% + 10% equal 28%?
The second discount applies to the already-reduced price.



