Discount and Sale Price Calculator

Know the real price before you buy

Shops advertise percentages, but what you want is the final amount and how much you saved. This calculator covers the offers you are most likely to meet.

Single discount

Enter the original price and the discount percentage. You get the sale price, the amount saved and, if you add a sales tax rate, the price including tax. It is the quickest check for a "30% off" sign.

Stacked discounts

Many promotions combine, for example a seasonal sale plus a coupon. Add each discount as a separate row and the tool applies them one after another. The list shows the price after every step, and the effective discount is always less than the simple sum: 20% and 10% give 28%, not 30%. Use up to six steps.

Buy X get Y free

Enter the price per item, how many you are taking, and the offer: for example buy 2 get 1 free. The tool works out how many items are free, what you pay and your effective discount. An optional extra percentage lets you add a coupon on the paid items.

Reverse calculations

On the Reverse tab, enter the sale price and discount to recover the original price. Or enter the original and sale prices to find the discount percentage a shop has applied. This is useful for spotting inflated "was" prices.

Shopping tips

• Compare the price per item, not just the headline percentage.
• A big discount on something you do not need is still money spent.
• Check the small print on stacking, because many stores exclude sale items from coupons.
• Prices are rounded to the nearest cent at each stage, like a till would.

All calculations run in your browser and nothing is stored.