How it works
Measure profit as a percentage of revenue. Include every cost relevant to the margin you intend to measure.
margin = (revenue−cost)/revenue × 100
Worked example
Show example inputs and result
Revenue: 1,000 · Cost: 700.
- Margin
- 30 %
- Profit
- 300
Questions and answers
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method reviewed: October 8, 2026 · Methods & accuracy