Gross margin calculator
Find gross margin percent from selling price and unit cost on any line.
Calculator
Gross margin calculator
Live result
—Enter values to see results update live.
Why this matters
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The core margin check
Margin on selling price is what you have left for labor, rent, and profit.
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Invoice cost, not list price
Use the unit cost from your bill — that is what actually moved.
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Foundation for protection
Every tool in this stage builds on knowing your margin percent.
Quick answers
What is gross margin?
Selling price minus unit cost, divided by selling price. It shows how much of each sale covers overhead and profit.
Margin vs markup?
Margin is on selling price. Markup is on cost. The next calculator converts between them.
What is a healthy gross margin?
It varies by business. Use your target margin in the thin-margin and break-even tools to set your own floor.
Sources & citations
Formulas follow standard cost-accounting definitions. CostBeacon defaults are documented in product help and technical guides.
Formula reference
(selling price − unit cost) ÷ selling price
CostBeacon
Turn invoices into cost history
Upload supplier PDFs and get line-item unit costs, price alerts, and margin insights — without spreadsheets.