Discount calculator
How much do you really save? Get the final price from a percent-off discount, or find the true discount by comparing two prices.
From percent off to sale price
From two prices to the real discount
Watch out for inflated discounts
Not every discount is real: sometimes the "original price" is quietly raised shortly before a sale so the markdown looks bigger than it is — a classic trick around Black Friday and Prime Day. The true discount should always be measured against the price the item actually sold for in the weeks before the promotion, not against a made-up list price.
How to tell whether a deal is genuine
The most reliable check is the price history: if today's price really is the lowest it has been in recent months, the deal is real. Price-tracking sites and browser extensions chart how an item's price has moved over time and flag verified all-time lows, so a ten-second look at the graph tells you whether that "50% off" banner deserves your money or your skepticism.