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Discount Calculator

Calculate the final price after percentage, fixed, or buy-X-get-Y discounts. Stack multiple discounts, add sales tax, and compare deals from different stores side by side to find the best price.

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Quick Facts

20% + 10% off= 28% total (not 30%)
BOGO (buy 2)= 50% off
BOGO (buy 3)= 33% off
US avg sales tax~7.12%

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How to Use This Calculator

  1. Choose your discount type: percentage, fixed amount, or buy-X-get-Y.
  2. Enter the original price and discount details.
  3. Optionally add a second discount, quantity, or tax rate.
  4. Use the Compare Deals tab to compare prices across multiple stores.

The Formula

Percent: Final = Price × (1 - Discount/100). Fixed: Final = Price - Amount. Double: Final = Price × (1 - D1/100) × (1 - D2/100). BOGO: Paid Items = Total - Free Items; Final = Paid × Price.

Frequently Asked Questions

Stacked (double) discounts are applied sequentially, not added together. A 20% off coupon plus a 10% off sale means: first 20% off the original price, then 10% off the reduced price. So 20% + 10% off $100 = $72, not $70.