Discount Stack
Stack multiple discounts and coupons to find the final price.
About Discount Stack
Stacked discounts are sequential, not additive: 20% then 10% is not 30% but roughly 28%. Each percentage is taken from the price left after the prior discount. Retailers apply coupons one after another, so stacking never reaches the arithmetic sum of the percentages.
Formula
Discount Stack
Each discount is applied sequentially to the already-reduced price
- sequential
- Each discount is applied to the price after the previous discount
Worked example
With the default values below, Discount Stack returns Final Price of $68.40. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Original price
- 100
- First discountaccepts 0–100 %
- 20 %
- Second discountaccepts 0–100 %
- 10 %
- Third discountaccepts 0–100 %
- 5 %
Results
- Final Price
- $68.40
- Total Savings
- $31.60
- Effective Discount
- 31.60%
Step by step
- 1Values used
- 2Discount Stack
- 3Final Price= 68.40
- 4Total Savings= 31.60
- 5Effective Discount= 31.60
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Discount Stack calculated?
Each discount is applied sequentially to the already-reduced price Stacked discounts are sequential, not additive: 20% then 10% is not 30% but roughly 28%. Each percentage is taken from the price left after the prior discount.
Why does Discount Stack matter?
Retailers apply coupons one after another, so stacking never reaches the arithmetic sum of the percentages.
What values do I need to enter?
This calculator takes 4 inputs: Original price, First discount, Second discount, Third discount. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.