Free discount calculator for sale price, percent off & savings. Includes reverse modes: find the original price or the discount % needed to hit a target.
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Shopping a sale? Our discount calculator shows exactly how much you'll save and what you'll pay. Calculate the sale price from any percent off, stack multiple discounts (like an extra 20% off an already-reduced price), and add sales tax for the true final price. Need to work backwards? Switch modes to find the original price from a sale price, or the exact discount percentage needed to reach a target price. Know your real savings before you buy.
A discount (or percent off) reduces the original price by a percentage. For 25% off $100 you save $25 and pay $75 — the sale price. When you stack discounts, the second applies to the already-reduced price, not the original, so 30% plus an extra 20% is 44% off, not 50%. Sales tax is applied to the discounted price, raising the final amount. This calculator also works in reverse: enter a sale price and discount to recover the original price, or enter an original and target price to find the discount percentage you need.
Discount Calculation Formula
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.
Recover an item's original price from the sale price you paid.
Find the exact discount percentage needed to bring an item down to your budget.
Calculate the final price and your savings from any percent off in real time.
Combine a sale with an extra coupon and see the true compounded discount, not a simple sum.
Add your local sales tax to see the real amount you'll pay at checkout.
Work backwards from a sale price to the original, or find the exact discount needed to hit a target price.
See how much you save in both dollars and percentage terms at a glance.
One-tap buttons for common percentages like 10%, 25%, and 50% off.
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.
Multiply the original price by the discount percentage to get the savings, then subtract from the original. For 20% off $50: $50 × 0.20 = $10 off, so you pay $40.
20% off $50 is $10 off, leaving a sale price of $40. Multiply $50 by 0.20 for the discount ($10), then subtract it from $50.
Percent off is the share of the price you don't pay. 25% off means you pay 75% of the price — on an $80 item you pay $60 and save $20.
Subtract the sale price from the original, divide by the original, then multiply by 100. From $80 to $60: ($80 - $60) ÷ $80 × 100 = 25% off.