About This Calculator
Slovin's formula is used to calculate the minimum sample size needed in a statistical survey given the population size and a desired margin of error. It is particularly useful when the population is too large for a census to be practical.
How It Works
Enter the total population size and your desired margin of error (default is ±5%). The calculator will use Slovin's formula to determine the smallest number of responses needed to achieve statistically significant results within your specified margin of error.
Frequently Asked Questions
What is Slovin's formula?
Slovin's formula is n = N / (1 + N*e^2), where n is the sample size, N is the population size, and e is the margin of error.
Why use Slovin's formula?
It provides a quick way to estimate the minimum sample size needed for a survey when the population is large, ensuring results are statistically significant without surveying the entire population.