https://unstick.me/determine-the-sample-size-study/

Epi Info software

https://www.cdc.gov/epiinfo/index.html

The question : what is the type of the study design ?

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Another software online which is : MedCalc

https://www.medcalc.org/calc/test_one_mean.php

Test for one mean calculator.

Test for one proportion calculator

Comparison of means calculator

Comparison of proportions calculator

Comparison of Coefficients of Variation calculator

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OpenEpi is free and open source software for epidemiologic statistics.

http://www.openepi.com/Menu/OE_Menu.htm

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GPower software version 3.0.10

In the first place, you need to gave the following:

1. Confidence interval

2. Population standard deviation

Then you can apply

3. Cochran's formula

Edit this please in the question doctor Sajjad ,, How much sample , not who much sample.

Thanks

https://www.researchgate.net/deref/https%3A%2F%2Fwww.cdc.gov%2Fepiinfo%2Findex.html