Standard Deviation Calculator
Explore spread, variance and mean for a data set.
● Live results · Runs on your device · No sign-upYour inputs
Population divides squared deviations by n; sample divides by n − 1.
Explore spread, variance and mean for a data set.
● Live results · Runs on your device · No sign-upPopulation divides squared deviations by n; sample divides by n − 1.
Explore spread, variance and mean for a data set.
For 2, 4, 4, 4, 5, 5, 7, 9 the population mean is 5 and population standard deviation is 2. Sample standard deviation is about 2.1381.
Population divides squared deviations by n; sample divides by n − 1.
It is a visual aid, not a replacement for the numeric output. Some charts compare values with different units, and those magnitudes are not directly comparable.
Check units, signs, assumptions and rounding first. The tool cannot know whether the values you enter describe the real situation correctly.