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Sample Size Calculator

The Sample Size Calculator, are you conducting a study or a survey? Determine the ideal sample size to easily achieve accurate and reliable results. To calculate the ideal sample size, enter the population size, desired confidence level, and margin of error. Our simple calculator guides you step by step, avoiding sample sizes that are larger than the population. With our interactive bar chart, you can compare the population and sample size. Make informed research decisions to ensure statistically sound results.

Sample Size Calculator

Sample Size:


Percentage of Total Population:


How to use the Sample Size Calculator :

Input Population Size: On the calculator form, look for the input field labeled “Population Size.” Enter the total population size you want to study. Enter “5000” in the Population Size input if you are conducting a survey in a town with 5000 residents.

Enter Confidence Level: Locate the “Confidence Level (%)” input field. Enter the level of confidence you want for your research. The most common confidence levels are 90%, 95%, and 99%. If you want a 95% confidence level, for example, enter “95” in the Confidence Level input.

Margin of Error (%): Locate the input field labeled “Margin of Error (%).” Enter your study’s acceptable margin of error. The margin of error represents the amount by which the sample results can differ from the actual population results. For example, if you want a 5% margin of error, enter “5” in the Margin of Error field.

Click “Calculate”: Once you have entered all the required information, click on the “Calculate” button. Your inputs will now be processed by the calculator, and the results will be displayed.

Examine the Sample Size: On the calculator form, look for the “Sample Size” result. This value represents the recommended sample size required for accurate and statistically significant results. If the sample size exceeds the population size, an error message will be displayed indicating that the sample size cannot exceed the population size.

Check Percentage of Total Population: The “Percentage of Total Population” result is located below the “Sample Size” result. This value depicts the sample size’s percentage representation in relation to the total population. This value will be displayed if the sample size is correctly calculated. If there is an error, it will display a hyphen (“-“).

Interpret the Results: You can interpret the results based on the calculated sample size and percentage to determine the adequacy of your sample for statistical analysis. A higher percentage and a larger sample size indicate a more reliable and accurate representation of the population.

Reset the Calculator (Optional): You can reset the calculator by clicking the “Reset” button if you want to perform additional calculations. This will delete all of the input fields as well as the calculated results.

Apply the Sample Size: With the recommended sample size in hand, you can now move forward with your study or survey, ensuring that your data collection efforts align with the sample size required for meaningful results.

 Sample Size Calculator - Learnleansigma

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