Discount Calculator: Percent Off & Final Price
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Discount Calculator
Sales, coupons, and percent-off deals all come down to the same math. This free discount calculator answers the three questions shoppers actually ask: what will I pay after the discount, how big is the discount when I can see both prices, and what was the original price before the sale.
How percent off works
Amount saved = Price × (Discount ÷ 100) and Final price = Price − Amount saved
Example: a jacket costs 80 with 25% off. You save 80 × 0.25 = 20, so you pay 60.
Quick percent-off reference
- 10% off — you pay 90% of the price (100 → 90)
- 20% off — you pay 80% (100 → 80)
- 25% off — you pay 75% (100 → 75)
- 50% off — you pay half (100 → 50)
- 70% off — you pay 30% (100 → 30)
Finding the real discount
Stores advertise "was 120, now 90" — but what percent is that? (120 − 90) ÷ 120 × 100 = 25% off. Use the "Find the discount %" mode to check whether a deal is as good as it sounds, and the percentage increase calculator to see how much a price has gone up over time.
FAQs
Multiply the price by the discount percentage divided by 100 to get the amount saved, then subtract it. For example, 25% off 80: the saving is 20, so the final price is 60.
Subtract the sale price from the original price, divide by the original price, and multiply by 100. If an item dropped from 120 to 90, the discount is (120 − 90) ÷ 120 × 100 = 25%.
20% of 50 is 10, so 20 percent off 50 leaves a final price of 40.
Divide the sale price by (1 − discount ÷ 100). If you paid 60 after a 25% discount, the original price was 60 ÷ 0.75 = 80. Use the "Original price" mode above.
Stacked discounts multiply, they don't add. 20% off then an extra 10% off is 0.8 × 0.9 = 0.72 of the price — a 28% total discount, not 30%. Run the calculator twice, feeding the first result into the second calculation.