Markup Calculator
Selling price from cost and markup, or the markup a price implies.
The formula
price = cost × (1 + markup)
A $50 cost with a 30% markup sells for $65. Markup is measured on cost, which makes it the natural tool when you start from what you paid; margin (profit over price) is what the accountant reads off the income statement afterwards.
Quick reference
Common equivalences: 25% markup = 20% margin, 50% markup = 33.3% margin, 100% markup (keystone pricing, the retail default for apparel) = 50% margin. The gap between the two numbers widens as prices rise, so quoting the wrong one gets more expensive the better your pricing looks.