Standard error of a sample mean
Statistics / FREE CALCULATOR
Estimate the standard error from a standard deviation and sample size.
Your answer starts here.
Enter your values and select Calculate to see the result and any available breakdown.
How to use this calculator
- Enter sample standard deviation. Use the unit shown beside the field.
- Enter sample size. Use the unit shown beside the field.
- Select Calculate and review the result. Select Reset to restore the example inputs.
How the calculation works
Sample standard deviation/sqrt(Sample size)
Worked example
Sample standard deviation = 10; Sample size = 25. Result: 2 input units.
Understand your result
Estimate the standard error from a standard deviation and sample size. The result is expressed in input units.
Assumptions and limitations
Assumes independent observations and a suitable sampling design. Results are rounded for display.
Questions about this tool
What does this tool calculate?
Estimate the standard error from a standard deviation and sample size.
What should I check before using the answer?
Assumes independent observations and a suitable sampling design.
Related guides
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