Margin of Error Calculator

To use the calculator, select the desired confidence interval (99%, 95%, or 90%) and insert the desired or achieved sample size.

MOE: ±%


The MOE indicates the possible fluctuation in results to be considered based on the confidence interval. For example, a sample size of n=400 yields a MOE of ±4.9% at the 95% confidence level, which means that 95 out of 100 times the survey is conducted the results will fall within a ±4.9% range.

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