Calculate discounts, sale prices, and savings instantly.
Use this discount calculator to quickly figure out the sale price and how much money you save. Three modes cover every scenario: enter a percentage to find the final price, enter the final price to find the discount percentage, or enter the dollar amount saved to reverse-calculate the percentage.
Optional tax rate lets you see the total cost after tax. Everything runs in your browser — no data is stored or sent anywhere.
Multiply the original price by the discount percentage divided by 100. Subtract that from the original price. For example, 20% off $50: $50 × 0.20 = $10 discount, so you pay $40.
Apply the first discount, then use the result as the new original price for the second discount. A 20% + 10% discount is not the same as 30% off.
Tax is applied after the discount. So if a $100 item is 20% off, you pay $80 + tax. With 8% tax: $80 × 1.08 = $86.40.
Enter the original price and discount percentage. The calculator shows the discounted price, the amount you save, and optionally adds sales tax to the final amount. You can also reverse-calculate: enter the sale price and original price to find the discount percentage.
Stacked discounts and sales tax make mental math unreliable. A '30% off plus an extra 15% off' sale does not equal 45% off — it equals 40.5% off. Adding tax afterward changes the final number again. This calculator handles all these scenarios so you know exactly what you will pay before reaching the checkout.
Need to calculate the percentage one number is of another? Use our Percentage Calculator.