Sample Size Calculator
Remember that when you figure out a sample size, it refers to the number of actual respondents. That is, the number of people that you contact minus the number that fails to reply. If you need some ideas for increasing your response rate and what to do about non-respondents, be sure to contact us before sending out your questionnaire.

Sample size calculator provided by Creative Research Systems Survey Software

Determine Sample Size 

Confidence Level: 95%99%
Margin of Error (%):
Population Size:
   

   
Sample size needed:

INSTRUCTIONS: Click desired confidence level. Then fill in margin of error (%) desired; e.g. "3.5" If the population being sampled is small and finite, enter the size, otherwise leave it blank. Then hit calculate button.