Skip to content
Money

Discount Calculator

Discount Calculator

Find the sale price after a percent or dollar discount, how much you save, and the total with sales tax.

$
%

Percent off, or dollars off if you chose dollar amount.

%

For stacked deals such as 30% off plus an extra 10% at checkout.

%

Results appear as you type.

How to use

  1. Enter the original price.
  2. Choose percent off or dollar amount off, then enter the discount.
  3. Add an extra percent off if the deal stacks, and your local sales tax rate.
  4. Read the sale price, what you save, and the total you will pay.

Formula

sale price = price × (1 - discount / 100)
with an extra discount: sale price × (1 - extra / 100)
sales tax = sale price × tax rate / 100
total = sale price + sales tax

Worked examples

25% off with tax

An $80 item at 25% off is $60.00, so you save $20.00. With 8.25% sales tax you pay $64.95.

Stacked discounts

$120 at 30% off plus an extra 10% is $75.60, a total of 37% off, not 40%. With 7% tax the total is $80.89.

Dollars off

$15 off $49.99 is $34.99.

Assumptions

  • Sales tax is charged on the discounted price. That is how most US stores ring up a sale, but check local rules for coupons.
  • Stacked discounts apply one after the other, not added together.
  • Amounts are rounded to the cent.

FAQ

How do I calculate a discount?

Multiply the price by the percent off divided by 100 to get the savings, then subtract it from the price. 25% off $80 is $80 × 0.25 = $20 off, so $60.

Is 30% off plus 10% off the same as 40% off?

No. The second discount applies to the already reduced price, so 30% plus 10% works out to 37% off.

Do I pay tax on the original or the sale price?

Usually on the sale price after store discounts. Manufacturer coupons can be taxed differently depending on the state.

Related tools