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Discount Calculator

Find the price after a percent-off sale, see exactly how much you save, and check what an extra coupon on top of a sale is really worth.

Result

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How to use this calculator

  1. Enter the original price and the percent off.
  2. If there is an additional coupon or 'extra % off', enter it as the second discount.
  3. Add your local sales tax rate if you want the final price at the register.

The formula

Sale price = price × (1 − d1 ÷ 100) × (1 − d2 ÷ 100) Savings = price − sale price With tax = sale price × (1 + tax ÷ 100)

Stacked discounts multiply; they do not add. 20% off and then an extra 10% off is a 28% total discount, not 30%.

Worked example

$80 jacket, 25% off

  1. 25% of 80 = $20 saved.
  2. Sale price = 80 × 0.75 = $60.
  3. With 8% sales tax: 60 × 1.08 = $64.80.
  4. Stacked example: 20% off, then 10% off a $100 item: 100 × 0.8 × 0.9 = $72, a total discount of 28%.

Try the stacked example above by entering 100, 20 and 10.

Frequently asked questions

How do I calculate a percent-off price?

Multiply the original price by (100 − discount) ÷ 100. For 30% off $50: 50 × 0.70 = $35.

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

No. The second discount applies to the already reduced price, so the total is 28%.

Is sales tax charged on the original or the sale price?

In most U.S. states, on the price you actually pay after a store discount. Manufacturer coupons can be treated differently, so check your state's rules.

How do I find the original price from a sale price?

Divide the sale price by (1 − discount). A $60 item that was 25% off originally cost 60 ÷ 0.75 = $80.

Is a 'compare at' price always a real former price?

It should be. U.S. Federal Trade Commission guides say a former price used in a comparison should be one the item was actually and openly offered at in good faith for a reasonable period.

Sources

Last reviewed November 6, 2026. Calculations run in your browser; nothing you type is sent to us. Spotted a mistake? Tell us.