Work out sale prices, stacked discounts, and exactly how much you save. Free discount calculator with deal checker.
"30% off, plus an extra 10% off at checkout" sounds like 40% off. It isn't — it's 37%. Shops apply discounts one after another, each on the already-reduced price, and the gap between what you expect and what you pay is pure profit for them. This calculator shows the real final price, the true combined discount, and whether the "deal" deserves your money.
Take a $100 item: 20% off brings it to $80. An extra 10% off takes 10% of $80 ($8), not 10% of $100 — so you pay $72, a 28% total discount, not 30%. The bigger the discounts, the bigger the gap. Now you know why "extra 20% off sale items" is the retailers' favourite phrase.
Because the second discount applies to the already-discounted price. 20% off $100 is $80; 10% off $80 is $72. Your real total discount is 28%, not 30% — and the gap grows with bigger discounts.
Stacked small discounts, 'was/now' pricing against an inflated original price, and 'up to 70% off' banners where only one lonely item qualifies. The calculator's deal rating cuts through all of that.
In most places the discount comes off first and tax applies to the reduced price — which is what this calculator does. A few jurisdictions differ, so treat the total as a close estimate.
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