Discount Calculator
Enter an original price and discount percentage to see the amount saved and final price, with optional stacked second discount and tax — and a breakdown of exactly how the math works.
Examples
$100, 20% then 10%, 8% tax
Saved $28 · final $77.76
How it works
The first discount is taken off the original price. A second discount is taken off the already reduced price, not added to the first, and tax is applied last, on the discounted price.
$100, 20% off, then 10% off, plus 8% tax 100 − 20% = $80.00 80 − 10% = $72.00 (saved $28, a 28% discount) 72 + 8% tax = $77.76
This is why “20% off plus an extra 10%” is 28% off, not 30%. The order of the two discounts does not change the final price. “Effective discount” shows the single percentage that equals both discounts together.
How to use Discount Calculator
Why use this tool
Frequently asked questions
The second discount applies to the already-reduced price, not the original, which is why two 10% discounts don't equal 20%.
Tax is applied to the discounted price, matching how most retailers calculate it.
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