Markup is the increase from cost to selling price, measured against the cost. Penn State Extension stresses that it is not the same as profit margin: a 30% markup on a $1.00 item gives a $1.30 price, but the $0.30 profit is only about 23% of that price.
Formula
markup (%) = (price − cost) ÷ cost × 100
price = cost × (1 + markup ÷ 100)
Example
A $50 item sold for $70 earns $20, a markup of 20 ÷ 50 = 40%. The same $20 is a gross margin of 20 ÷ 70 = 28.57%.
Markup vs margin
Markup uses cost as its base and margin uses price, so markup is always the larger percentage. Pricing from a target margin needs price = cost ÷ (1 − margin); University of New Hampshire Extension shows a $2.50 item at 40% margin costs $4.17 but at 40% markup only $3.50. Convert with the markup calculator or the table in how to calculate profit margin.