Sample Size Calculator for Estimating a Single Proportion

  • Provides live interpretations.
  • Assesses the influence of changing input values.
  • Adjusts sample sizes for finite population and clustering.

Input Values

Specify input values and click Calculate. Hover over for help.

  0.95
  0.50

Note: You may adjust the calculated sample size for clustering, response rate or finite population using the 'Adjust' button.


Influence of Changing Input values on Sample Size Estimates

Customize Visualisation

Customize the plot by changing input values from here.

From Min
To Max
By
(Select)
1st Series
2nd Series
3rd Series

Note: You may adjust the calculated sample size for clustering, response rate or finite population using the 'Adjust' button.

Visualisation

This visualisation assumes a 95% level of confidence and plots sample sizes for three precision levels of 2, 3 and 5 percent. You may change the default values from the panel on the left.

Download Figure

Table of Sample Sizes at a range of Proportion and Precision values

Customize Table

Customize the table by changing input values from here.

From Min
To Max
By
(Select)
From Min
To Max
By

Note: You may adjust the calculated sample size for clustering, response rate or finite population using the 'Adjust' button.

Sample Size Table

This table assumes a 95% level of confidence and shows sample sizes for a range of proportion and precision levels. You may change the default input values from the panel on the left.

Download Table