Easy Sample Size Calculator

Predicted samples size with power analysis.

Significance level 95%
Power level 80%
Control mean:
Control SEM:
Control n-number:
Test mean:
Test SEM:
Test n-number:
Predicted sample size:

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I developed this easy sample size calculator to simplify power analyses. It assumes standard settings of 95 % significance level and 80 % power.

Just enter MEAN, SEM, and N-NUMBER for CONTROL and TEST groups from a similar previous study. The calculator will tell you the required n-number you would need based on the difference and deviation.

If you use this calculator to help inform your experiments, please reference it as: https://nicneuro.net/easy-sample-size-calculator/