G* power is a free statistical software that allows the user to determine the sample size needed based on a wide variety of tests.
Using Gpower for Power and Sample Size Analysis
Power Analysis: Determining Sample Size for Quantitative Studies
Computing sample size for a Chi squared test using GPower 3
Sample Size In Logistic Regression: Calculating Correctly!
G*Power: Estimating Required Sample Size for Regression Model
Download G*Power for Mac
Multiple Regression Power Analysis
How To Determine Sample Size From G*Power
Sample Size In Logistic Regression: Calculating Correctly!
Two independent proportions power analysis