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Discount Calculator

Find the sale price and your savings for any percent-off discount, including extra discounts and sales tax.

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How to use Discount Calculator

  1. 1Enter the original price.
  2. 2Enter the discount in percent, or tap one of the common values such as 20% or 50%.
  3. 3Optionally add an extra discount (for example a coupon on top of a sale) and the sales tax rate.
  4. 4Read the final price, the amount you save and the effective total discount.

Calculate sale prices and savings

Shop windows shout "30% off", "extra 15% at checkout" and "buy now, save more" — but what will you actually pay? This discount calculator turns any percent-off deal into a clear final price, shows how much money you save and handles stacked discounts and sales tax correctly. It works for clothes, electronics, groceries, business quotes or any other price. All calculations happen in your browser.

Features

  • Sale price and savings from any original price and discount percentage.
  • Quick buttons for common discounts: 10%, 15%, 20%, 25%, 30%, 40%, 50% and 70%.
  • Stacked discounts — add an extra coupon or loyalty discount applied on top of the sale price.
  • Effective discount — see the real total percentage when two discounts are combined.
  • Sales tax — optionally add tax after the discount to see the amount you'll pay at the till.
  • Any currency and instant results as you type.

Examples

  • 25% off 80: you pay 60 and save 20.
  • 40% off 249.99: you pay 149.99 and save 100.00.
  • 30% off, then an extra 20% off 150: 150 → 105 → 84. You save 66, an effective discount of 44%, not 50%.
  • 15% off 60 with 8% sales tax: 51 before tax, 4.08 tax, 55.08 in total.

How stacked discounts work

When a store offers "an extra X% off sale prices", the second discount is applied to the reduced price, not the original. The combined discount is therefore:

1 − (1 − first) × (1 − second)

So 20% + 10% is 28%, 50% + 20% is 60%, and 30% + 30% is 51%. The order doesn't matter — 20% then 10% gives the same result as 10% then 20%.

Shopping tips

  • Compare final prices, not percentages. 40% off an inflated "original" price can still be more expensive than a smaller discount elsewhere.
  • Check whether coupons stack. Many stores allow only one discount code per order.
  • Remember shipping and tax. A bigger discount can be cancelled out by delivery fees.
  • Watch the unit price. For groceries, compare price per kilogram or litre — the Unit Converter helps with different pack sizes.

Need other percentage calculations, such as percentage increase or "what percent of X is Y"? Use the Percentage Calculator.

Frequently asked questions

How do I calculate a discount?
Multiply the original price by the discount percentage and subtract the result. For 25% off 80: 80 × 0.25 = 20, so the sale price is 80 − 20 = 60. Equivalently, multiply the price by (1 − 0.25) = 0.75.
Is 20% off plus an extra 10% off the same as 30% off?
No. The extra discount is applied to the already reduced price, so the total is 28%, not 30%. On a price of 100, 20% off gives 80, and 10% off 80 gives 72. The calculator shows this as the effective discount.
Is tax added before or after the discount?
In most places sales tax is charged on the price you actually pay, so it's added after the discount. That's how this calculator works. If your store applies tax differently, the final figure may differ slightly.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount). If an item costs 60 after 25% off, the original price was 60 ÷ 0.75 = 80. The Percentage Calculator can also do this kind of reverse calculation.
Which currency does it use?
Any. Enter prices in your own currency and the results use the same currency.

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