Net Profit Margin Calculator
Calculate net profit margin from revenue and net profit, or estimate profit from total expenses to assess business profitability.
Enter revenue and net profit, or leave net profit blank and enter total expenses, to measure net profit margin for the same period.
About Net Profit Margin
Net profit margin shows how much of each revenue dollar remains after every operating cost, interest, tax, and other expense recognized in the period. It is the most complete common profitability ratio because it sits at the bottom of the income statement. The net profit margin calculator divides net profit by revenue and expresses the result as a percentage. If net profit is left blank, profit is estimated as revenue minus total expenses so you can still produce a first-pass margin from a simple P&L sketch. When both net profit and expenses are entered, net profit is used. That matches a reported bottom line and avoids double-counting. Revenue must be the same period as profit: mixing annual sales with quarterly profit inflates or deflates the margin. Use net sales after returns and allowances when that is how the statement is presented. A 15 percent margin on $100,000 of revenue means $15,000 of profit; the same $15,000 on $200,000 of revenue is only 7.5 percent, which is a volume-and-mix story rather than a profit-dollar story. Net margin is not gross margin or operating margin. Gross margin stops at cost of goods sold. Operating margin stops before interest and tax. A company can post a healthy gross margin and a weak net margin if overhead, leverage, or tax expense is heavy. Industry benchmarks also differ: grocery and distribution businesses often run on thin net margins with high turnover, while software and specialty services may show higher margins with different cost structures. Compare like with like and look at several periods, not a single month distorted by a one-off gain or write-down. A high net margin is not automatically a cash surplus. Working-capital growth, capex, and debt service can consume the profit. A low or negative margin is a signal to inspect pricing, mix, cost of goods, overhead, and non-operating items rather than a verdict by itself. Use the net profit margin calculator to compare scenarios, check a draft statement, or translate a target margin into required profit. For published reporting, reconcile the inputs to the income statement and accounting policies in force.
Net Profit Margin Examples
Each example uses net profit ÷ revenue, or revenue minus expenses when net profit is omitted.
| Input | Output | Notes |
|---|---|---|
| Revenue $100,000; net profit $15,000 | Net profit $15,000.00; net profit margin 15.00% | A straightforward reported bottom line on $100,000 of sales. |
| Revenue $200,000; net profit $15,000 | Net profit margin 7.50% | Profit dollars are unchanged, but the margin halves as sales scale without extra profit. |
| Revenue $80,000; net profit left blank; total expenses $68,000 | Net profit $12,000.00; net profit margin 15.00% | With net profit empty, profit is revenue minus expenses. |
How to Calculate Net Profit Margin
- Enter revenue for the same period as the profit figure you want to test.
- Enter net profit from the income statement, or leave it blank and enter total expenses instead.
- Select Calculate to see net profit and net profit margin.
- Compare the margin with prior periods and similar businesses before changing prices or costs.
Net Profit Margin FAQ
What is net profit margin?
Net profit margin is net profit divided by revenue, shown as a percentage. It measures how much of sales remains after all expenses recognized in the period.
Should I use net profit or expenses?
Use reported net profit when you have an income statement. Leave net profit blank and enter total expenses only when you are estimating profit as revenue minus costs.
How is net margin different from gross margin?
Gross margin subtracts only cost of goods sold. Net margin subtracts operating costs, interest, tax, and other below-the-line items, so it is usually lower.
Can net profit margin be negative?
Yes. A loss produces a negative margin. That means expenses exceeded revenue for the period and should be investigated by cost category.
Does a high net margin mean the business is generating cash?
Not necessarily. Receivables, inventory, capital spending, and debt payments can absorb profit. Pair the margin with a cash-flow view.