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Discount Calculator

Find the sale price and how much you save after a percentage discount, including an optional second discount and sales tax.

Free ยท no sign-up Runs in your browser
Price and discounts
An extra discount is taken off the already reduced price, so 20% + 10% saves 28%, not 30%.

How to use the discount calculator

  • Enter the original price of the item.
  • Enter the discount percentage, for example 25 for 25% off.
  • If there is an extra offer, such as a coupon on top of a sale, enter it as the extra discount.
  • Add a sales tax rate if tax is charged at the checkout.
  • Press Calculate to see how much you save and what you will pay.

How the price is calculated

Price after discount = Original price × (1 − Discount / 100) × (1 − Extra discount / 100)

Tax = Price after discount × Tax rate / 100, and the final price is the price after discount plus tax. Every money amount is rounded to two decimal places.

Worked example

A jacket costs 120.00 and is 30% off, with a coupon for a further 10% off and 7% sales tax:

  • After the first discount: 120.00 × 0.70 = 84.00
  • After the coupon: 84.00 × 0.90 = 75.60
  • You save 120.00 − 75.60 = 44.40
  • Tax: 75.60 × 0.07 = 5.29
  • Final price: 75.60 + 5.29 = 80.89

Stacked discounts are not added together

A second discount is taken from the price that is already reduced, not from the original price. That is why 20% off followed by 10% off saves 28%, not 30%. The calculator shows this combined discount whenever you enter a second one.

Good to know

  • Sales tax is normally charged on the discounted price, which is how this calculator works.
  • A 100% discount makes the item free, and any rate above 100% is rejected.
  • The order of two percentage discounts does not change the final price: 10% then 20% gives the same result as 20% then 10%.

Frequently asked questions

How do I calculate a discount?

Multiply the original price by the discount percentage and divide by 100 to get the amount saved, then subtract it from the price. For 25% off 60.00, you save 15.00 and pay 45.00.

Is 20% off plus 10% off the same as 30% off?

No. The second discount applies to the already reduced price. On 100.00, 20% off leaves 80.00 and another 10% off leaves 72.00, a total saving of 28%.

Is sales tax calculated before or after the discount?

In most places tax is charged on the price you actually pay, which is after the discount. This calculator applies the tax rate to the discounted price.

Does it matter which discount is applied first?

No. Percentage discounts are multiplied together, so the order does not change the final price.