How many people will you need to survey?

If you have not yet conducted your survey and want to calculate how many people you need for your random sample, use calculators #1 and #2 below.

1 - How many survey respondents will you require?

Specify your desired error level and population size below and click calculate. The numbers next to each confidence level indicate how many people need to complete your survey to achieve the specified error level.
How much error are you willing to tolerate?
If you are not sure, try somewhere between 3% and 6%
   %
How many people are in your population?
  
  90% Confidence
95% Confidence
99% Confidence

2 - How many people need to complete the survey?

How many people need to
complete the survey?
From Calculator #1 above
  
What is your estimated response rate?
What % of people do you
expect to complete the survey?
   %
  Amount needed to complete survey