Discount Calculator

A straightforward question with a surprisingly common trap. The simple case is easy: 20% off a 100 price means you pay 80. But retailers love stacked offers — "30% off, plus an extra 10% at checkout" — and that is not 40% off. The extra 10% applies to the already-discounted price, so the true total is 37% off. Retailers phrase it that way precisely because most shoppers add the numbers; this calculator multiplies them correctly and shows the effective discount so you know the real deal before paying.

Enter the original price and the discount percentage; the final price, the amount saved, and the effective discount update live. Got a stacked offer? Put the second percentage in the extra-discount field — the tool applies it sequentially, exactly as the checkout will, and flags the multiply-not-add distinction right in the result.

Useful at both ends of a sale: as a shopper comparing offers ("40% off" versus "30% + extra 15%" — the second is better at 40.5%), and as a seller sanity-checking what a promotion actually does to your margin before announcing it. Works with any currency since it's all percentages, instantly, in your browser.