margin = profit ÷ selling price × 100Margin uses selling price as its reference; markup uses cost. They are not the same percentage.
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Break-even calculator
Estimate the units and revenue needed to cover fixed costs.
LocalFree
This tool runs on your device in the browser.
Instructions and limitations
TOOL GUIDE
What this tool is for
Break-even calculator — Estimate the units and revenue needed to cover fixed costs.
Useful for quick everyday estimates and for checking arithmetic with clearly entered values.
Common uses
- Check everyday arithmetic
- Compare possible values
- Create a quick estimate
Educational and informational use
Results are general estimates, not legal, financial, tax, medical, engineering, or other professional advice. Check inputs and units and consult a qualified professional for important decisions.
EXPLANATION & EXAMPLE
Understand the result—not just the number
Cost 60, sell 100 → profit 40 → margin 40%After calculating, the tool shows the values used and the working so you can check it.