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Standard Error of the Mean Calculator
Calculate the standard error of the mean from the standard deviation and sample size.
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SEM
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Calculate the standard error of the mean from the standard deviation and sample size.
Standard Error of the Mean Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: SEM = s / sqrt(n).
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Standard Quick Guide
Typical values for reference.
| SD | n | Spare | SEM |
|---|---|---|---|
| 15 | 4 | – | 7.500 |
| 15 | 16 | – | 3.750 |
| 15 | 36 | – | 2.500 |
| 15 | 100 | – | 1.500 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Standard Error of Calculator FAQ
Answers to common questions about this calculator.
Divide.
It gives a quick estimate of standard error of the mean from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.