Turn a cost and a selling price into the numbers that actually matter for pricing. Enter what an item costs you and what you sell it for, and the calculator returns the profit per unit, the markup percentage (profit as a share of cost) and the gross margin percentage (profit as a share of price). People often confuse markup and margin, and mixing them up can seriously distort a pricing decision, so seeing both side by side keeps you honest. This is useful for setting prices, checking a supplier quote, or understanding a competitor. It works in any currency because it only deals with the numbers you enter. Results update instantly and are computed locally in your browser.