Discount calculator
Enter the original price and the discount. Add a second discount to see what stacked offers are really worth.
- Final price
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- You save
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- Total discount
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How to calculate a discount
Multiply the original price by the discount percentage and divide by 100 to get the savings, then subtract it from the price. A 25% discount on 80: 80 × 25 ÷ 100 = 20 saved, final price 60.
Stacked discounts do not add up
A 20% discount followed by an extra 10% is not 30% off. The second discount applies to the already reduced price: 100 → 80 → 72, which is a total discount of 28%.
The formula for the combined discount is 1 − (1 − d₁) × (1 − d₂).
Frequently asked questions
How much is 30% off 50?
30% off 50 saves 15, so the final price is 35.
Is 20% + 10% off the same as 30% off?
No. Applied one after the other, 20% then 10% off equals a total discount of 28%.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount ÷ 100). A price of 60 after 25% off was originally 60 ÷ 0.75 = 80.