Triple Discount Calculator

Stack a percent off, a fixed-dollar markdown, and a coupon to find the final price.

Enter the original price plus percentage, fixed, and coupon discounts applied in that order.

Triple Discount Calculator
Stack a percent off, a fixed-dollar markdown, and a coupon to find the final price.

About Stacked Triple Discounts

Retailers rarely apply one markdown in isolation. A holiday sale, an instant rebate, and a coupon code often hit the same cart, and the order of those cuts changes the amount you actually pay. The triple discount calculator applies a percentage discount first, subtracts a fixed-dollar amount, then applies a coupon percentage to what remains. The displayed result is the final price, floored at zero so stacked offers cannot produce a negative checkout total. The formula is final price = max(0, (original price × (1 − percent/100) − fixed discount) × (1 − coupon/100)). A $100 item with 20% off, a $5 instant markdown, and a 10% coupon becomes ($100 × 0.80 − $5) × 0.90 = $67.50. A $200 item with 30% off, $10 off, and a 5% coupon becomes ($200 × 0.70 − $10) × 0.95 = $123.50. A $50 item with 10% off, no fixed cut, and no coupon finishes at $45.00. Shoppers use stacked-discount math to compare competing carts, and merchants use it to test whether a coupon still leaves a viable margin after the sale price. Because percentages compound, a 20% sale plus a 10% coupon is not a 30% cut; it is a 28% cut before any dollar-off rebate. Applying the coupon before the dollar-off amount would change the result, so match the sequence your register or checkout rules actually use. Enter the list price before tax and shipping unless your store discounts those lines as well. Percent fields are percentages, not decimals. A coupon that is itself a fixed dollar amount belongs in the fixed-discount field, not the coupon-percent field. Taxes, membership fees, and shipping are excluded. The calculator does not encode a particular retailer’s stacking policy; if a coupon cannot combine with a sale price, set the unused discount to zero. Recalculate whenever a code, rebate, or sale percentage changes.

Triple Discount Worked Examples

Discounts apply in order: percentage, then fixed dollars, then coupon percent.

InputsResultInterpretation
$100 price, 20% off, $5 off, 10% coupon67.5After 20% and $5, the coupon applies to $75 and leaves $67.50.
$200 price, 30% off, $10 off, 5% coupon123.5The stacked sequence yields $123.50 rather than a naive 45% off.
$50 price, 10% off, $0 off, 0% coupon45A single 10% markdown leaves $45.00.

How to Calculate a Triple Discount

  1. Enter the original price before the stacked offers.
  2. Enter the first percentage discount, then any fixed-dollar markdown.
  3. Enter the coupon as a percent of the remaining price, using 0 if none applies.
  4. Select Calculate to see the final price after all three cuts.

Triple Discount Calculator FAQ

Does 20% off plus 10% off equal 30% off?

No. Percent discounts multiply. Twenty percent off followed by ten percent off is a 28% reduction from list before any dollar-off amount.

What order does the calculator use?

Percentage discount, then fixed-dollar discount, then coupon percent. If your register applies the coupon first, the final price will differ and you should rearrange the inputs to match the register.

Can the final price go negative?

No. The result is floored at zero. A $10 item with $15 off still shows 0 rather than a credit, unless a store policy separately issues a refund.

Should I include sales tax?

Enter the pre-tax merchandise price unless tax is also discounted. Most jurisdictions tax the reduced price, so tax is applied after this calculation, not inside it.

Where do I put a dollar-off coupon?

Add it to the fixed-amount discount. The coupon field is a percentage of the remaining price, not a second dollar figure.