Statistics Calculators
Paste your data and see each step of the calculation, worked out with exact fractions until the very last step.
- Standard deviationMean, variance and standard deviation, row by rowLive
- Mean, median, mode and rangeAll three averages and the range, with the workingLive
- Z-scoreHow far a value is from the mean, and its percentileLive
Which one do I need?
To measure how spread out a set of numbers is, use the standard deviation calculator. It gives the mean, the variance and the standard deviation for a whole population or a sample, and a z-score for every value.