Margin of Error Calculator — math calculators and step-by-step solvers
The Margin of Error Calculator estimates the uncertainty around a sample mean. Choose a confidence level of 90%, 95%, 98%, or 99%, enter the standard deviation and the sample size, and the tool returns the matching z-score, the standard error of the mean, the margin of error, and the interval width
Category: Statistics
About this tool
What Is Margin of Error Calculator? Margin of Error Calculator The Margin of Error Calculator estimates the uncertainty around a sample mean. Choose a confidence level of 90%, 95%, 98%, or 99%, enter the standard deviation and the sample size, and the tool returns the matching z-score, the standard error of the mean, the margin of error, and the interval width as a +/- value. Use it in surveys and research reporting to state how precisely a sample mean estimates the population mean.. How to Use Make sure you understand the formula or method this tool uses. Enter your values in the correct fields with compatible units. Review the result, compare it with expected values, and use the related tools if needed. Frequently Asked Questions How do I use Margin of Error Calculator? Enter the required data in the appropriate fields and the tool will display the result immediately.