Your figures
Result
How this calculator works
Give the calculator a cost and the markup percentage you want to apply. It multiplies the cost by one plus the markup to produce the selling price, then shows the profit per unit and — the part most people actually need — the margin that markup works out to. The table under the result converts the common markups (25%, 50%, 100% and so on) into their equivalent margins for your cost, so you can see the whole ladder at once.
Markup is the natural tool at the pricing stage because it starts from the number you know: your cost. Retail and wholesale have run on it for centuries. Its trap is that it flatters you. Doubling your money sounds like a 100% return, but a 100% markup is a 50% margin, and if your rent, wages and tax come out of that margin, half the sticker price is already spoken for.
Good practice and limits
If a supplier, a marketplace or a business partner quotes you a margin, convert before you compare. The conversion is margin = markup ÷ (1 + markup), and the table on this page does it for the common steps. And when you set a markup, set it per product line rather than one blanket figure: fast-moving staples rarely carry the markup that slow, specialist lines need to earn their shelf space.