Discount & Sale Price Calculator
Sale price · Amount saved · Stacked coupons · Reverse-solve for % off
This discount calculator finds the sale price and dollar amount saved from any percent-off deal, lets you stack a second coupon on top (correctly — stacked discounts multiply, not add), adds sales tax, and can also work backward to tell you the exact discount percentage between two known prices.
How the Sale Price Is Calculated
A percentage discount reduces price by a fraction of itself. Stacked discounts apply sequentially — each one to the already-discounted price, not the original — which is why two discounts never simply add together.
| Variable | Definition |
|---|---|
| P | Original price before any discount |
| d₁ | First discount, as a decimal (25% = 0.25) |
| d₂ | Second/extra stacked discount, applied after the first |
Example: a $100 item at 25% off, plus an extra 10% off at checkout: $100 × 0.75 × 0.90 = $67.50. Total combined discount is 32.5% — not the 35% you'd get by simply adding 25% + 10%.
⚠️ Expert Pro-Tip
"40% off" almost never means what it sounds like when discounts stack. Retailers advertise headline numbers like "up to 40% off" that combine a storewide markdown with a coupon code — but because the discounts multiply rather than add, the real number is usually 3–5 percentage points lower than the sum implies. Always plug both discounts into the stacked-discount field above before deciding whether a deal genuinely beats a competitor's flat price.
Discount & Sale Price Calculator
Find the Sale Price
$67.49
Final Price Per Item
$22.50
Total Saved (25.0% off, 1× qty)
$67.49
Total Order Cost
Know Both Prices? Find the Discount %
25.0%
off · $30.00 saved
Based on your results — what to do next:
Buying across state lines or online?
Your final price of $67.49 used a 0% tax rate — check the exact rate for your state or the seller's location.
Does $67.49 fit your budget?
See how this purchase fits into your monthly spending using the 50/30/20 rule.
Redirect the $22.50 you saved
Discounts only help your finances if the savings actually get saved — see how $22.50 grows toward a goal.