Discount Calculator
Calculate the final price for single or stacked discounts. Find out the true effective discount when combining multiple coupons or promotions.
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You Save $20.00
Final Price $80.00
Why Stacked Discounts Aren't Additive
A common misconception is that stacking a 20% and 10% discount gives 30% off. It doesn't — here's why:
| Discounts Applied | On $100 | Naive Sum | Actual Effective |
|---|---|---|---|
| 20% + 10% | $72.00 | 30% | 28.00% |
| 15% + 15% | $72.25 | 30% | 27.75% |
| 10% + 10% + 10% | $72.90 | 30% | 27.10% |
| 50% + 20% | $40.00 | 70% | 60.00% |
Frequently Asked Questions
What is a discount calculator? ▼
A discount calculator finds the final price after applying a percentage reduction. Enter the original price and discount percentage to get instant savings and final price.
How do stacked discounts work? ▼
Stacked discounts are applied sequentially, not additively. A 20% discount followed by a 10% discount is NOT 30% off — it is 28% off. Each discount applies to the already-reduced price.
Is 20% off + 10% off the same as 30% off? ▼
No. 20% off $100 = $80. Then 10% off $80 = $72. Total savings = $28 (28% effective discount), not $30 (30%).
How do I calculate the effective discount of stacked coupons? ▼
Use the Stacked Discounts mode. Enter each coupon/discount percentage and the calculator shows the true effective discount and step-by-step breakdown.
What is the formula for discount? ▼
Discounted Price = Original Price × (1 − Discount%/100). Savings = Original Price × Discount%/100.