Discount Calculator
See the sale price and how much you save when a percentage is taken off. Enter the original price and the discount, and the final price and your savings appear instantly.
Enter values above to see the result.
How it works
The amount you save is the discount percentage of the original price, and the final price is what's left:
saved = price × (discount% ÷ 100)
final price = price − saved
A worked example
A $120 item with 15% off:
saved = 120 × 0.15 = $18.00
final price = 120 − 18 = $102.00
Stacking discounts
When two discounts apply, they multiply rather than add. A 20% coupon on top of a 10%-off sale doesn't make 30% off — the 20% comes off the already-reduced price:
$100 → 10% off → $90 → 20% off → $72
That's a final price of $72, or 28% off overall, not 30%.
Quick mental math
Round percentages are easy to estimate: 10% is the price with the last digit dropped, 25% is a quarter, and 50% is half. For something like 15%, take 10% and add half of it again.
Frequently asked questions
How do I calculate a percentage off?
Multiply the price by the discount percentage to get the amount saved, then subtract that from the price. For example, 25% off $80 saves $20, leaving a final price of $60.
How do stacked discounts work?
Stacked discounts apply one after another, not added together. Taking 20% off and then another 10% off is not 30% off — the second discount comes off the already-reduced price, which works out to 28% off overall.
What's a quick way to estimate a discount in my head?
For 10%, move the decimal one place left ($80 → $8). For 20%, double that ($16). For 25%, take a quarter off. Combine these for other amounts — 30% is 10% three times.