Formula
CV=sample SD / sample mean ×100%
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Use a ratio-scale measurement with a meaningful zero. CV is inappropriate for interval scales such as Celsius temperature.
Example Calculation
Example inputs
- Data: 2, 4, 6
Data2,4,6 have mean4 and sample SD2, giving CV50%.
Frequently asked questions
How do I use this calculator?
Enter data. The result updates automatically. Use Reset to restore the example values.
What method does it use?
CV=sample SD / sample mean ×100%. Use a ratio-scale measurement with a meaningful zero. CV is inappropriate for interval scales such as Celsius temperature.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.