Discount Calculator
Work out a sale price, your total savings, or the original price before a discount.
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Applied on top of the already-discounted price, e.g. an extra 20% off clearance.
You pay
$90.00
25% off $120
How discounts are calculated
sale price = original × (1 − discount% ÷ 100)
original price = sale price ÷ (1 − discount% ÷ 100)
original price = sale price ÷ (1 − discount% ÷ 100)
Stacked discounts multiply, they don't add: 25% off followed by an extra 20% off is not 45% off — it's a combined discount of 1 − (0.75 × 0.80) = 40%.
Because the second discount applies to the already-reduced price, not the original. On a $120 item, 25% off brings it to $90; an extra 20% off $90 is $18, landing at $72 — a 40% total discount, not 45%.