Profit margin calculator

This is gross margin on one item or one order: revenue minus cost, as a share of revenue. It is not net profit; operating costs, tax, interest, and discounts never enter the math. The reverse mode prices a single sale for a target margin and says nothing about whether that price wins customers. Margin and markup are different scales on the same profit: markup divides by cost, margin divides by revenue, so read them side by side before quoting either.