How this calculator works
Enter revenue, cost of goods sold, and operating expenses for the same period. Gross profit is revenue minus direct costs associated with producing or delivering what you sell. Gross margin is gross profit divided by revenue. Net operating profit in this simplified model is gross profit minus operating expenses, and net margin divides that figure by revenue.
Markup is the amount added to cost expressed as a percentage of cost. It is not the same as margin, which is expressed as a percentage of selling price. For example, a 50% markup on a cost of 100 produces a price of 150 and a 33.3% gross margin. The calculator uses revenue less cost of goods sold as the cost base for markup.
The net figure here is not necessarily accounting net income. Interest, taxes, owner compensation, depreciation, and other items may be excluded or classified differently. A service business may also categorize labor differently from a product business. Apply a consistent accounting policy when comparing periods.
What the results mean
Gross margin shows how much revenue remains after direct production or delivery costs, before operating overhead. Net margin in this tool shows what remains after the operating expenses entered. These ratios let you compare periods of different sizes, but they do not reveal cash timing or the quality of reported data.
Markup helps with pricing arithmetic, but a target margin requires a different formula. To set a price for a desired gross margin, divide cost by one minus the target margin. Confirm that all relevant costs are included before using that result in a quote.
Common mistakes to avoid
Do not confuse markup with margin: markup compares profit with cost, while margin compares profit with revenue.
Do not compare gross and net margins as if they were the same measure; operating expenses affect net profit but not gross profit.
Do not compare periods or accounting definitions that differ. A ratio is only useful when the underlying revenue and cost figures are consistent.
Use margins to find useful questions
Compare like with like: use the same period, currency, and cost definitions. A falling gross margin may indicate supplier increases, discounting, waste, or a changing product mix. A healthy gross margin alongside weak net margin may point to overhead that grew faster than revenue.
Do not assume that a benchmark from another industry is your target. Business models vary widely. Track your own historical trend and investigate meaningful changes rather than making a decision from one percentage alone.
Use consistent categories to make comparisons meaningful
Before comparing a month with another month, decide which costs belong in direct cost of goods sold and which belong in operating expenses. Classification depends on the accounting policy and business model. A contractor's delivery labor, for example, might be treated differently across firms. Changing the definition midway through a trend makes the percentages difficult to interpret.
Revenue should be measured on a consistent basis. Discounts, refunds, sales tax collected for authorities, and timing differences can affect the amount that belongs in a comparison. Reconcile the input with reliable accounting records rather than pulling a number from a dashboard that may use a different definition.
Margin and markup are useful for different questions. Margin asks what share of the selling price remains as profit after a defined cost. Markup asks how much was added relative to cost. Confusing the denominators can lead to prices below a target margin even when the markup percentage seems large.
A percentage can improve while the underlying business gets smaller, or decline while total profit grows with scale. Review both the ratio and the dollar amounts. Look for changes in supplier prices, labor mix, discounts, product mix, rework, and overhead before deciding that a margin movement is good or bad.
The output is not a substitute for financial statements. Interest, taxes, depreciation, owner compensation, and unusual items can sit outside this simple model. For decisions about hiring, credit, valuation, or profit distributions, use complete records and professional accounting guidance.
When comparing a result with an industry benchmark, first confirm that the benchmark uses the same accounting definitions, business model, and period. Public company ratios, for example, may include cost classifications that do not map cleanly to a sole proprietor's books. A benchmark can prompt a question, but a decision should be grounded in reliable data about your own business.
If the calculation produces a negative margin, check that revenue and cost inputs cover the same period and that a cost has not been entered twice. If the result is still negative, investigate the drivers before making a broad cut. Some expenses support future revenue or compliance; the objective is to understand their effect, not to assume every cost can be removed safely.
Frequently asked questions
What is the difference between margin and markup?
Margin compares profit with selling revenue; markup compares the added amount with cost.
Can a margin be negative?
Yes. If costs exceed revenue, the corresponding profit and margin are negative.
What belongs in cost of goods sold?
Direct costs depend on your business and accounting method; use a consistent, professionally reviewed definition.
Does net margin include tax and interest?
Not in this simplified tool. It subtracts only the operating expenses you enter.
How do I price for a target margin?
For a known cost and target gross margin, price equals cost divided by one minus that margin.
This page is educational information, not individualized tax, legal, or financial advice. Verify current rules with the relevant authority or a qualified professional.
Official sources and further reading
Use current official guidance to confirm rules for your circumstances: