Discount Calculator

Multiply the original price by the discount percentage and divide by 100 to get the amount you save, then subtract it from the original price. For 25% off a price of 80: 80 × 25 ÷ 100 = 20 saved, so the sale price is 80 − 20 = 60. A quicker way is to multiply by what is left: 25% off means you pay 75%, and 80 × 0.75 = 60.

When a shop offers an extra 10% off sale items that are already 20% off, the second discount applies to the reduced price, not the original. A price of 100 first drops to 80, and 10% of 80 is 8, so you pay 72. That is 28% off in total, not 30%. Likewise 40% off followed by another 20% off is 52% off, not 60%. The Two discounts option shows each step and the true combined discount.

In a buy 2 get 1 free offer, every group of three items includes one free item. With three items at 30 each you pay for two, 60 in total, which is 33.33% off. With four items you still get only one free, so you pay 90 and save just 25%. The calculator counts the free items for any basket size, shows the effective discount and the real price per item, so you can see when adding one more item makes the deal better.

To check a sale label, subtract the sale price from the original price, divide by the original price and multiply by 100. An item reduced from 80 to 60 is (80 − 60) ÷ 80 × 100 = 25% off. Use this to compare offers in different stores or to check whether was-and-now prices really match the advertised discount.

In the United States and Canada, sales tax is usually added at the till after the discount, so a 60 sale price with 8% tax costs 64.80. In the UK, the EU, India and Australia, shelf prices normally already include VAT or GST, so leave the tax field empty there. To add or remove GST or VAT from a price, use the GST Calculator.