Calculate discount amounts, final prices after discounts, and total savings with optional tax calculations
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Shopping a sale? Our discount calculator helps you figure out exactly how much you'll save and pay. Calculate single discounts, stacked discounts (like an extra 20% off sale prices), and see the final price with sales tax. Know your true savings before you buy.
A discount reduces the original price by a percentage. For a 25% discount on $100, you save $25 and pay $75. When stacking discounts, the second discount applies to the already-reduced price, not the original. Adding sales tax increases the final amount you pay.
Discount Calculation Formula
Final Price = Original × (1 - Discount%) × (1 + Tax%)Quickly calculate prices during sales events and clearances.
See your real savings when using multiple discounts together.
Know exact final prices including tax before checkout.
Compare different discount offers to find the best deal.
Stacked discounts apply sequentially, not together. A 30% discount plus 20% extra isn't 50% off. First 30% comes off ($100 becomes $70), then 20% off the new price ($70 becomes $56). Total savings: 44%, not 50%.
For a single item, 50% off is better. BOGO requires buying two items, so you pay full price for one. If you need two items, they're equivalent. But 50% off one item saves money if you only need one.
Sales tax is calculated on the discounted price, not the original price. So discounts reduce both what you pay and the tax you owe. This is why we apply the discount first, then tax.
Divide the sale price by (1 - discount%). For example, if an item is $60 after 25% off: $60 ÷ 0.75 = $80 original price.
Use the formula: Discount % = (Original - Target) ÷ Original × 100. For $80 down to $50: ($80 - $50) ÷ $80 × 100 = 37.5% discount needed.