Statistics Calculators
All of our free statistics calculators in one place. Each one shows a clear result and a step-by-step solution, so you can learn as you calculate.
Averages and Centers
Find the typical or central value of your data.
Average Calculator
Find the mean of any set of numbers. See the sum, the count and the average with every step explained.
Open calculator →Median Calculator
Find the middle value of your data. Numbers are sorted for you and the middle position is shown.
Open calculator →Mode Calculator
Find the most frequent value in a data set, including data sets with more than one mode.
Open calculator →Weighted Mean Calculator
Find the weighted average of grades, prices or scores that have different importance.
Open calculator →Geometric Mean Calculator
Find the geometric mean of positive numbers, or the average growth rate of percentage changes.
Open calculator →Spread and Variability
See how far apart the values in your data are.
Standard Deviation Calculator
Find the standard deviation and variance of your data, for a sample or a whole population.
Open calculator →Variance Calculator
Find the variance and sum of squares of your data, for a sample or a whole population.
Open calculator →Range Calculator
Find the minimum, maximum and range of your data, plus the midrange.
Open calculator →Mean Absolute Deviation Calculator
Find the average distance of your values from the mean or the median, with every step shown.
Open calculator →Coefficient of Variation Calculator
Find the standard deviation as a percentage of the mean, to compare the spread of different data sets.
Open calculator →Quartile Calculator
Find Q1, the median, Q3 and the IQR of your data, with the five-number summary and outlier limits.
Open calculator →Position and Ranking
Find where a value sits compared with the rest of the data.
Z Score Calculator
Find the z-score of a value from a mean and standard deviation, or from your own data, with its percentile.
Open calculator →Percentile Calculator
Find the percentile rank of a value in your data, or the value at any percentile you choose.
Open calculator →Z Score to Percentile and P-Value Calculator
Turn a z-score into a percentile and left, right and two-tailed p-values, or find the z-score for a percentile.
Open calculator →Summaries and Estimates
Summarize your data and plan or judge a study.
Descriptive Statistics Calculator
Get the mean, median, mode, quartiles, standard deviation and more for your data in one go.
Open calculator →Standard Error Calculator
Find the standard error of the mean from your data, or from a standard deviation and a sample size.
Open calculator →Confidence Interval Calculator
Find the confidence interval and margin of error for a mean or a survey percentage, with t or z values.
Open calculator →Sample Size Calculator
Find the sample size you need for a survey or study with Cochran, Slovin or Yamane formulas.
Open calculator →Tables and Data Organization
Organize raw values into clear frequency tables.
Frequency Table Calculator
Count how often each value appears, calculate relative and cumulative frequencies, or group numbers into classes.
Open calculator →Which Calculator Should I Use?
- If you want the typical value, start with the Average Calculator. If your data has a few very large or very small values, the Median Calculator is often a better choice.
- If you want to know how spread out your data is, use the Standard Deviation Calculator, or the Quartile Calculator if you prefer the IQR.
- If you want to compare a single value with the rest of the data, use the Z Score Calculator or the Percentile Calculator.
- If you have a z-score and want a percentile or a p-value, use the Z Score to Percentile and P-Value Calculator.
- If you want a quick summary of everything at once, use the Descriptive Statistics Calculator.
- If you are planning a survey, use the Sample Size Calculator. If you already have your results, use the Confidence Interval Calculator.
Created by Sajid Ali, SmartStatCalc · Last updated: 12 November 2026
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