Our confidence interval calculator can help show you the reliability of an estimate for a sample. A confidence interval can be explained as an estimate or a range of values that determine the accuracy and reliability of an estimate. This term is used in statistics and shows the confidence an estimate of a population will be accurate. This means that if the confidence interval is 90% for a given data set then the the values should be accurate and contain the unknown value for the entire population 90% of the time.

In confusing terms, the confidence interval is an estimate of the accuracy of the estimate provided through the sample size of a given population. This interval can be used to estimate the accuracy of your data.

To use the confidence interval calculator simply enter the sample size used to collect data along with the actual population number. Enter the percentage and select the confidence level you are using. Our calculator will determine the confidence interval for you.