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Discount / Percent Off Calculator
Calculate the sale price after a percent-off discount (including stacked discounts and sales tax), or the discount percentage from two prices.
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How to use this calculator
Enter your values after choosing the type of calculation in the tabs. The result updates as you type; press Calculate to confirm and jump to the result on mobile. Use Share to send the calculator with your result.
How discounts work
sale price = original × (1 − discount ÷ 100)
% off = (original − sale) ÷ original × 100
Stacked discounts multiply, they don’t add: 25% off then an extra 10% off is 1 − 0.75 × 0.90 = 32.5% off, not 35%. Sales tax is applied to the discounted price.
Frequently asked questions
What is 25% off $80?
$60 (you save $20).
About this tool
- Written by
- [Author: to be assigned]
- Reviewed by
- Expert review pending
- Last updated
- 31 Oct 2026
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