Calculate the discount amount, final price, and total savings from a percentage-off or amount-off discount. Stack a second discount on top to see the real final price after two sequential markdowns.
A percentage-off discount is calculated as a fraction of whatever price it's applied to, which means it automatically scales with the item's price — a 20% discount removes more in absolute terms from an expensive item than from a cheap one, while representing the exact same relative savings on both. An amount-off discount, by contrast, removes a fixed sum regardless of the price it's applied to, so it represents a larger relative discount on inexpensive items and a smaller relative discount on expensive ones. Both are calculated the same basic way — original price minus discount amount equals final price — but they behave very differently as the underlying price changes, which is worth keeping in mind when comparing two differently-structured promotions.
When a second discount is applied on top of a first, it's calculated against the price that remains after the first discount, not against the original price — this is how virtually every real-world checkout system, from physical retail registers to e-commerce carts, actually applies multiple simultaneous discounts. The practical consequence is that stacking two percentage discounts always yields a combined discount slightly smaller than simply adding the two percentages together: 20% and 10% stacked give 28% total off, not 30%, because the 10% only applies to the smaller, already-reduced price. This gap grows larger as the discount percentages grow larger, and it's a frequent source of confusion (and occasional frustration) for shoppers expecting simple addition — understanding the mechanism removes the surprise and lets you calculate the real final price with confidence before checking out.
When a second discount is enabled, this tool shows exactly how the price moved through each stage: the starting price for that step, the amount removed by that specific discount, and the resulting price after that step — culminating in the final price after both discounts have been applied. This breakdown is useful for more than just seeing the final number; it lets you verify that a store's advertised discount sequence matches what you'd expect, spot-check a receipt or checkout total against the math, or simply understand which of two stacked promotions contributed more to your overall savings.
Whether a percentage-off or an amount-off discount saves you more money depends entirely on the price of the item and the specific numbers involved — there's no universal rule that one type is always better. A flat 100-off coupon is a better deal than 10% off on any item priced below 1000 (since 10% of anything under 1000 is less than 100), but a worse deal than 10% off on anything priced above 1000. When you're choosing between two differently-structured discount offers for the same purchase, the only reliable way to know which saves more is to actually calculate both against your specific price — exactly what this tool is built to make quick and error-free.
Sequential discount stacking shows up constantly in everyday shopping: a storewide seasonal sale (a percentage off nearly everything) combined with an additional loyalty-member or newsletter-signup coupon (often a smaller percentage or a flat amount), a clearance markdown followed by an additional checkout-wide promo code, or a bundle discount followed by a payment-method-specific discount (like an extra percentage off for using a store credit card). In every one of these cases, the second promotion is virtually always calculated against the already-discounted price from the first, which is exactly the calculation this tool's stacking feature is designed to reproduce accurately, so you know the real final price before you commit to a purchase rather than being surprised at checkout.
Discount Calculator handles percentage-off and amount-off pricing math. These related calculators cover other everyday shopping and percentage calculations.