Reckonary / Everyday / Stacked discount
Final price
Stores love a layered sale: "30% off, then an extra 20% at checkout." It sounds like 50% off, but it isn't. Each discount comes off the price the previous one already lowered, so the deals multiply instead of adding up. This calculator does that math for you and shows the real final price, how much you save, and the true effective discount.
Enter the original price, then set each discount with the sliders. The tool applies them in sequence: it takes the price, removes the first discount, removes the second from what's left, and the third after that. Leave a slider at zero if you only have one or two deals. The ledger bar under the result shows your effective discount — the single percent-off that would land on the same final price.
Take a $100 jacket with 20% off and an extra 10% at the register. First the price drops to $80, then 10% off $80 brings it to $72. You save $28, which is a 28% effective discount — noticeably less than the 30% you'd get by simply adding the two numbers. The gap only grows as the discounts get bigger.
Is 20% off then 10% off the same as 30% off?
No. Stacked discounts multiply rather than add. 20% off then 10% off leaves you paying 80% of 90%, which is 72% of the price — a 28% effective discount, not 30%.
How do I work out the final price by hand?
Multiply the price by what's left after each discount. For $100 with 20% then 10%, that's 100 × 0.80 × 0.90 = $72. Apply each discount to the running total, one after the other.
Does the order of the discounts matter?
No. Because the percentages are multiplied together, swapping the order gives the exact same final price. 20% then 10% equals 10% then 20%.
What is the effective discount?
It's the single percent-off that would give the same final price as all your stacked deals combined. It's always less than the sum of the individual discounts.
Last reviewed June 2026. Stacked discounts multiply, so two 20% offs are not 40% off.