Discount Calculator
Price after one or two stacked discounts. Helpful for sales like "30% off, then take an additional 20% off."
Result
Final price
$0.00
You save
$0
Effective discount
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Why stacked discounts aren't additive
"30% off + 20% off" doesn't equal 50% off. Each discount applies to a smaller price. Math: $80 → $56 (after 30%) → $44.80 (after additional 20%). That's a 44% effective discount, not 50%.
The formula
Final = Original × (1 − d₁) × (1 − d₂)