Financial
Double Discount Calculator
Apply two sequential discounts and an optional tax to find the true final price.
Inputs
Double Discount Calculator
Result
Final price (after tax)
$136.00
- After first discount
- $160.00
- After second discount
- $136.00
- Total effective discount
- 32.00%
- You save
- $64.00
How it's calculated
Final = P · (1 − d1) · (1 − d2) · (1 + tax)
Common questions
Why isn't 20% + 15% the same as 35%?
Sequential discounts stack multiplicatively: (1 − 0.20)(1 − 0.15) = 0.68, or a 32% total discount — not 35%.
Does order matter?
For pure percentages, no — multiplication commutes. It matters if one discount is a dollar amount, which this calculator doesn't model.
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