What is the Profit Margin Calculator?
Gross profit margin measures what proportion of revenue survives the direct cost of delivering it. It is expressed as a percentage, which makes it comparable across businesses of very different sizes and one of the fastest health checks available.
This calculator computes gross profit and margin from revenue and cost of goods sold.
What each input means
- Revenue
- Total sales for the period, net of returns and discounts actually given.
- Cost of goods
- Direct costs of producing or acquiring what you sold — materials, direct labour, inbound freight. Not overheads.
How this calculation works
Gross profit is revenue minus cost of goods sold. Margin is that profit divided by revenue, expressed as a percentage. It shows how much of each unit of revenue remains to cover overheads and produce profit.
Gross margin sits above operating and net margin, which additionally subtract overheads and then interest and tax. A business can hold a healthy gross margin and still lose money if overheads consume everything below the line.
Formula: Result = the relevant inputs combined using the displayed assumptions.
Getting the most out of the result
- Include only direct costs in cost of goods. Rent and administrative salaries belong to operating expenses.
- Track margin over time rather than as a snapshot. A gradual decline usually signals cost creep or discount drift.
- Compare against typical margins in your sector, since normal ranges vary enormously between industries.
- Calculate margin per product line where you can. Blended figures conceal loss-making lines.
- Distinguish margin from markup — they are different calculations and confusing them causes underpricing.
Common mistakes to avoid
The most costly confusion is between margin and markup. A fifty percent markup on cost is only a thirty-three percent margin, and pricing built on the wrong one systematically undercharges. Owners also fold overheads into cost of goods, understating gross margin and making sector comparison meaningless. Reviewing only a blended figure hides individual products sold at a loss. And discounts given are frequently omitted from the revenue figure, overstating margin.
Frequently asked questions
What is the difference between margin and markup?
Margin is profit as a percentage of selling price; markup is profit as a percentage of cost. A product costing 100 and selling for 150 carries a 50 percent markup but a 33 percent margin. Mixing them up leads directly to underpricing.
What counts as cost of goods sold?
Direct costs attributable to what you sold — materials, direct labour, inbound freight, and manufacturing costs. Rent, marketing, administrative salaries and other overheads are operating expenses and sit below gross profit.
What is a good gross margin?
It varies dramatically by sector. Software businesses often run very high margins; grocery retail runs very low ones and makes up for it on volume. Compare against your own industry rather than against a general benchmark.
How is gross margin different from net margin?
Gross margin subtracts only direct costs. Net margin additionally subtracts overheads, interest and tax, showing what actually remains as profit. Gross margin can look strong while net margin is negative.
Why is my margin falling?
Common causes are rising input costs not passed through, increased discounting, a shift in sales mix toward lower-margin products, or higher shipping and returns. Comparing period to period by product line usually isolates it.
Can margin be negative?
Yes, when you sell below direct cost. It happens deliberately with loss leaders and accidentally when costs rise unnoticed. Sustained negative gross margin is unviable, since volume makes it worse rather than better.
Should discounts be deducted from revenue?
Yes. Use net revenue after discounts and returns. Calculating on list price overstates margin and hides the real effect of discounting.