Is that "40% off" deal actually a good deal? This discount calculator turns any original price and percent off into the exact sale price and how much you save — so you can compare offers in seconds while shopping.
How to calculate a discount
A discount is a percentage taken off the original price. Multiply the price by the discount percent to find your savings, then subtract: sale = price × (1 − discount ÷ 100). Worked example: a $79.99 jacket at 35% off saves $28.00, so you pay $51.99.
Quick mental shortcuts
For 10%, move the decimal one place ($80 → $8). For 20%, double that. For 25%, quarter the price. And a handy identity: X% of Y equals Y% of X — 8% of 50 is the same as 50% of 8, which is 4. The preset chips cover common sale percentages; the slider handles everything else.
Stacked discounts multiply — they don't add
"Extra 20% off already-reduced items" applies to the sale price, not the original. 50% off followed by an extra 20% off is 0.5 × 0.8 = 0.40 of the original — that's 60% off total, not 70%. Retailers count on shoppers adding the numbers; now you don't have to.
Finding the percent off or the original price
To get the discount rate from prices: percent off = (savings ÷ original) × 100. To recover an original price from a sale price: original = sale ÷ (1 − discount ÷ 100). A $60 item marked "25% off" originally cost $80. Remember the register may still add tax — get the final total with the sales tax calculator, and if you're splitting the purchase, try the tip & split calculator.