How to use the percent off calculator
- Enter any two values among original price, percent off, final price, and saved amount.
- Leave the other fields blank — they are calculated when you click Calculate.
- Stackable discounts — choose Yes if a second percentage applies to the already discounted price (not the original tag).
- Save the result using the Save button in the result panel.
Stackable vs combined discounts
A 20% store discount followed by a 15% coupon applies to the sale price, not the original. Combined they save less than 35% overall. This calculator models that correctly. For the underlying formulas and why discounts multiply instead of add, see How to Calculate Percentage: Simple Formulas with Examples.
Example
20% off $279, then an extra 15% off the sale price:
Examples and use cases
Real-world use cases
- Black Friday stack: A shopper checks whether a 30% doorbuster plus a 10% email coupon beats a single 40% advertised sale.
- Reverse price tag: Someone enters the final $84 checkout total and 30% off to confirm the original shelf price was $120.
- Commission planning: A reseller backs out pre-discount price from a client’s net invoice to calculate margin on a promotional deal.