Don’t you wish you could sometimes read people’s minds? Surveys can provide valuable insight into the opinions of a group of people you care about, such as customers, employees, or voters. One of the first steps to creating a survey of any kind is to determine who you will ask to participate.
Realistically, it’s unlikely you will be able to get every single person in the group of people you’re interested in to take your survey. You should aim to avoid response bias of people that represent the group as a whole. The participating survey respondents represent what is known in statistics as a sample size.
Figuring out how many people you need to achieve reliable data from your survey involves some detailed mathematics. The guide below offers an easy-to-use sample size calculator to help you determine the appropriate target number for the best results.
Additionally, we've listed out key terms and a more in-depth look at how to calculate the complex equation manually. Or you can jump down to our infographic for guidance on How to Create the Best Online Surveys.