This calculator goes beyond the final sale price and analyzes total savings, effective discount rate, coupon contribution and whether the offer is genuinely strong in one clear view.
Start with a blank form. Enter the original price, discount rate and optional fixed coupon. Results update automatically.
Use it for online promotions, store sales and cart coupons when you want the true combined saving. It is especially useful for offers such as “20% off + a $15 coupon.”
| Item | Value | Explanation |
|---|---|---|
| Original price | — | Starting price before any discount. |
| Discount amount | — | Amount removed by the percentage discount. |
| Coupon discount | — | Fixed discount additionally applied at checkout. |
| Final sale price | — | Expected final price after the modeled discounts. |
| Effective discount | — | Total savings expressed as a percentage of the original price. |
| Scenario | Final price | Savings | Effective discount |
|---|---|---|---|
| — | — | — | — |
First, the percentage discount is calculated from the original price. Any fixed coupon is then subtracted from the remaining price, capped so the final price cannot fall below zero. Total savings are the original price minus the final price.
A headline such as “20% off” does not always tell the whole story. Fixed coupons can materially change the effective discount, so this tool shows both effects together.
It is total savings divided by the original price. When a percentage discount and fixed coupon are combined, it shows the true overall discount on the original price.
No. The coupon is capped at the price remaining after the percentage discount, so the calculator never produces a negative final price.
Yes. Enter each store’s original price, discount rate and coupon separately to compare the resulting final price and effective discount.
No. Currency selection changes the display unit and formatting only; it does not perform foreign-exchange conversion.
The calculator applies the discount and coupon to the price you enter. If that price includes tax, the result remains tax-inclusive unless the seller applies different checkout rules.
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