About this stacked discount calculator
Retailers stack coupons and sale percents. This calculator applies discounts sequentially so you see the true effective savings.
How to use
- Enter original price.
- Enter up to three percent discounts in order.
Formula
Final = Price × (1−d1) × (1−d2) × (1−d3)
Worked examples
Example: $200 with 20% then 10% → $200 × 0.8 × 0.9 = $144 (28% effective off, not 30%).
Tips
- Check whether tax applies before or after discounts.
Frequently asked questions
Why isn't 20% + 10% equal to 30% off?
The second discount applies to the already-reduced price, so the combined effect is less than the sum of the percents.