Margin of Error Calculator
Enter your sample size, population proportion (or use 50% for maximum margin), and confidence level to calculate the margin of error for a survey or poll.
Inputs
Use 50% if unknown (worst-case scenario)
Leave as 0 for large populations
Results
Margin of Error
± 4.90%
Confidence Interval
45.10% to 54.90%
Standard Error
0.025000
Z-Value
1.960
Last updated:
Frequently Asked Questions
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