Profit Margin Calculator
Free CalculatorEnter your revenue and total cost to see your net profit margin, net profit and markup in seconds β privately.
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Runs in your browser β no numbers leave your device.
Your numbers
Total revenue β the money you take in before costs.
Total cost β what it cost you to earn that revenue.
Net profit margin
40.0%
Net profit divided by revenue β the share of each dollar of sales you keep as profit.
Net profit
$4,000
Revenue minus cost β the dollars left after paying every cost.
Markup
66.7%
Net profit divided by cost β how much you add on top of cost, which is always higher than margin.
How it works
Enter revenue
Add the total revenue for the period or the product.
Enter cost
Add the total cost of earning that revenue.
Read your margin
Profit margin, net profit and markup update live as you type.
Compare scenarios
Change price or cost to see how your margin moves.
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How to calculate profit margin
Net profit margin is the share of your revenue you keep as profit. The formula is simple: subtract total cost from revenue to get net profit, then divide net profit by revenue and multiply by 100. So $10,000 of revenue on $6,000 of cost leaves $4,000 of net profit and a 40% profit margin β you keep 40 cents of every dollar of sales.
Margin is often confused with markup, but they answer different questions. Margin divides profit by revenue; markup divides the same profit by cost. That same $4,000 profit is a 40% margin on $10,000 of revenue but a 66.7% markup on $6,000 of cost β markup is always the larger number. This calculator shows margin, net profit and markup together so you can price with confidence and compare products, campaigns or whole months at a glance.