Standard Error: SD = 100, n = 1000
A standard deviation of 100 and sample size of 1000 results in a standard error of approximately 3.16.
How to use this tool
- Enter standard deviation (s) and sample size (n) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your standard error (se) and the full breakdown beneath it.
Compute the standard error for a large-scale study with 1000 observations and high variability (SD = 100).
Frequently asked questions
- What is the difference between standard deviation and standard error?
- Standard deviation (SD) describes the variability of individual data points around their mean. Standard error (SE) describes the variability of the sample mean itself — it shrinks as sample size grows: SE = SD / √n.