This sample size calculator includes 4 different tools for calculating sample size for testing and surveying.
1) Marketing Campaign Sample Size Calculator
2) Sample Size Calculator for Surveys and Testing
3) Finite Universe Sample Size Calculator for Surveys and Testing where there is a finite universe of people
4) Confidence Interval (Margin of Error) Calculator where both the sample size and population are known.
Use this Marketing Campaign Sample Size Calculator (1) to determine a sample size for testing the response to an upcoming B2B or B2C marketing campaign, or for a research survey in which you want to determine how many people to interview or send questionnaires (the minimum sample size). Enter the percentage response rate as a whole number and / or decimal (i.e., 10 for 10%, 1.25 for 1.25%, .5 for .50 % of a percent, etc.)
Use Sample Size Calculator (2) to compute the sample size for a survey or testing depending on the confidence level desired and the confidence interval (also known as margin of error) are known.
Use Finite Universe Sample Size Calculator (3) to compute the sample size for surveying or testing where there is a finite population that can be tested or surveyed.
Use the Confidence Interval (4) Calculator to determine the confidence interval or margin of error when you know the sample size and the population size that is being surveyed or tested.
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