Sample Size Calculator for Thesis: Krejcie & Morgan, PLS-SEM, G*Power

What kind of study?

Your details

How many people are in your population? Everyone your study is about, e.g. all permanent staff of 5 banks.Confidence level Margin of error How far your result may be from the truth. 5% is common.

Expected response rate Not everyone answers. Many surveys get 40% to 70% back.

Your sample size

Good to know

This is the minimum. A bit more is always safer.
Count only usable questionnaires, after removing incomplete or careless ones.
Your supervisor may prefer one method. Krejcie & Morgan is the most common in Pakistan for surveys; PLS-SEM studies often add the inverse square root method.
The t-test, ANOVA and regression numbers use the same method as G*Power.