ROI & Profit Margin Calculator
Return on investment, margin, markup and payback.
ROI Calculator works out return on investment from a cost and a gain, annualises it over a holding period, and separately computes profit margin, markup and break-even — four numbers that get confused with each other constantly. Every result shows the formula used, and nothing is transmitted.
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How to use ROI & Profit Margin Calculator
- Choose ROI, margin, markup or break-even.
- Enter the cost and the revenue or gain.
- Read the result, the formula and the annualised figure.
Questions about ROI & Profit Margin Calculator
What is the difference between margin and markup?
Margin is profit as a share of the selling price; markup is profit as a share of the cost. Buy at 100, sell at 150: the markup is 50% but the margin is 33.3%. Pricing from the wrong one is a common and expensive mistake.
Why annualise ROI?
Because a 40% return means very different things over six months and over six years. Annualised ROI puts investments of different durations on a comparable footing using compound growth, not simple division.
Does it account for tax or inflation?
No — these are nominal, pre-tax figures. Compound Interest Calculator has an inflation adjustment if you need purchasing power rather than headline return.
How does the break-even mode work?
You give fixed costs, the price per unit and the variable cost per unit, and it returns the units needed to cover the fixed costs — fixed costs ÷ (price − variable cost). If the variable cost is at or above the price, there is no break-even point and it says so rather than returning a negative number.
Can I use it for advertising or campaign ROI?
The arithmetic is identical: money in, money out. What it cannot do is attribute revenue to a campaign, which is the genuinely hard part of marketing ROI and depends on your analytics rather than a formula. Feed it figures you already trust.
Is ROI & Profit Margin Calculator really free, with no limits?
Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.
Are my files or text uploaded when I use ROI & Profit Margin Calculator?
No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.