Profit Margin Calculator

A profit margin calculator shows how efficiently revenue turns into profit after selected costs are deducted. Sellers can calculate margin for one item, one order, a product category, or an entire reporting period, as long as revenue and cost cover the same scope. The result is a percentage of sales rather than only a dollar amount.

Margin is often confused with markup. A margin of 36% means 36 cents of each sales dollar remains as profit under the included costs. A markup percentage instead compares that profit with what the item cost. The distinction matters when using a target percentage to determine price or when comparing results with marketplace dashboards.

Subtract cost from revenue to obtain gross profit. Then divide gross profit by revenue and multiply by 100 to get profit margin. The calculator also divides profit by cost to give markup. If you are comparing several products, be consistent about whether fees, shipping, ad acquisition, labor, or overhead are included.

A negative output means costs exceeded revenue for the scope entered. A high margin may still omit fixed business costs if only variable product costs were used. Use an input definition that matches the question: pricing an order, assessing an ad-supported item, or reviewing overall operations are different analyses.

Ecommerce sellers face discounts, marketplace fees, shipping changes, and paid traffic costs that can rapidly reduce margin. Knowing the margin before launching a discount or paid campaign helps protect the profit that supports inventory, support work, and future growth. It is also easier to compare products using a percentage than dollar profit alone.

Small business owners can use margin trends to see where pricing or purchasing needs attention. This simple calculation is not a full income statement and does not decide what a good margin should be; industry, product type, risk, and operating costs all matter. Use actual records and verify important financial decisions with qualified advice.