You enter the original price and one or two discount percentages. For a single discount, the tool multiplies the price by the discount rate to get the savings, then subtracts that from the original price. For stacked discounts, it applies the first discount to the original price to get an intermediate price, then applies the second discount to that intermediate price. The order of stacked discounts does not affect the final result — 20% then 10% gives the same final price as 10% then 20%.
No. Mathematically, multiplying by (1 − d1) × (1 − d2) gives the same result regardless of order. A 20% off then 10% off equals a 10% off then 20% off. The final price and total savings are identical either way.
Multiply (1 − first discount) × (1 − second discount), then subtract from 1. For example, 20% and 10% stacked: (1 − 0.20) × (1 − 0.10) = 0.72, so the effective discount is 28%, not 30%.
Mathematically it does not matter — the final price is the same. However, some stores apply their sale first and then the coupon on the reduced price. Check the store's coupon policy to confirm they honor stacking.
No. Sales tax is typically calculated on the discounted price, not the original. To estimate your total out-of-pocket cost, take the final price from this calculator and add your local sales tax rate. Try the sales tax calculator for a quick estimate.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.