SQM Group

Sample Size and Margin of Error Calculator

Our sample size calculator will help you identify how many completed surveys you need for statistically significant results.

How many people do you need to take your survey?

Our Contact Center Customer Experience Studies for benchmarking and tracking first contact resolution (FCR) provide insights into customer experience (CX) and FCR performance and improvement opportunities. For the benchmarking study, a minimum customer survey sample of 400 is required. A client can increase the benchmarking study customer survey sample size, or for the tracking study, a client can use the customer survey sample size they prefer. When assessing a contact center customer experience, a good rule of thumb for the sample size is a margin of error of +/- 5.0. The below tool allows you to quickly calculate the margin of error resulting from a specific sample size. All you need to do is enter sample size or margin of error data into our calculator tool. To gain more insights into FCR importance, definition, measurement, goals, and ROI, download our First Call Resolution Re-imagined whitepaper.

Both margin of error and sample sizes for customer surveys (e.g; infinite population sizes) can be calculated with the tools below:

Margin of Error Calculator

To calculate the margin of error resulting from a specific sample-size, enter that sample size below:
#
Note: Margin of error is calculated at the 95% confidence level and a response distribution of 50%.

Sample Size Calculator

To determine the required sample-size that is necessary to be within a specific margin of error, enter that margin of error below:
%
Both margin of error and sample sizes for employee surveys (e.g; finite population sizes) can be calculated with the tools below:

Margin of Error Calculator

To calculate the margin of error resulting from a specific sample-size drawn from a defined population, enter that sample size and population amount below:
#
#
Note: Margin of error is calculated at the 95% confidence level and a response distribution of 50%.

Sample Size Calculator

To determine the required sample-size from a defined population that is necessary to be within a specific margin of error, enter that population amount and margin of error below:
#
%