Free Statistics Calculators Online
SmartStatCalc helps students, teachers and professionals solve everyday statistics problems in seconds. Enter your numbers, get the answer, and see every step.
Our Statistics Calculators
Pick a calculator below. Each one shows a clear result and a step-by-step solution.
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 →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 →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 →Quartile Calculator
Find Q1, the median, Q3 and the IQR of your data, with the five-number summary and outlier limits.
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 →Standard Error Calculator
Find the standard error of the mean from your data, or from a standard deviation and a sample size.
Open calculator →Descriptive Statistics Calculator
Get the mean, median, mode, quartiles, standard deviation and more for your data in one go.
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 →Mean Absolute Deviation Calculator
Find the average distance of your values from the mean or the median, with every step shown.
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 →Percentile Calculator
Find the percentile rank of a value in your data, or the value at any percentile you choose.
Open calculator →Sample Size Calculator
Find the sample size you need for a survey or study with Cochran, Slovin or Yamane formulas.
Open calculator →Frequency Table Calculator
Count how often each value appears, calculate relative and cumulative frequencies, or group numbers into classes.
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 →Why Use SmartStatCalc?
Statistics should be simple. Our tools are built to give you a correct answer without the hassle.
About Our Calculators
The average, median and mode are the three most common ways to describe the center of a data set. Each answers a slightly different question: the average (mean) adds everything up and shares it equally, the median finds the middle value, and the mode finds the value that appears most often.
Using all three together gives you a more complete picture of your data than any one of them alone. That is why we started SmartStatCalc with these tools. We have since added Standard Deviation, Variance and Range calculators to show how spread out your data is, a Z Score calculator to compare a single value with the rest of your data, a Quartile calculator for the IQR and outliers, a Coefficient of Variation calculator to compare relative spread, a Standard Error calculator to show how precise a sample mean is, a Descriptive Statistics calculator that summarizes your data in one go, a Confidence Interval calculator with margin of error, a Mean Absolute Deviation calculator, a Weighted Mean calculator, a Geometric Mean calculator, a Percentile calculator, a Sample Size calculator, a Z Score to Percentile and P-Value calculator, and a Frequency Table calculator to organize values and categories. We are adding more statistics calculators over time.
Frequently Asked Questions
Is SmartStatCalc really free?
Yes. All of our calculators are free to use, and you do not need to create an account.
Do you store the numbers I enter?
No. Your numbers are processed in your browser and are not saved on our servers.
Can I use the calculators on my phone?
Yes. The site works on phones, tablets and computers.
What is the difference between mean, median and mode?
The mean is the sum of the values divided by their count, the median is the middle value after sorting, and the mode is the most frequent value.
Will you add more calculators?
Yes. We are adding new statistics calculators regularly. If there is one you would like to see, tell us on the Contact page.
Have a Question or an Idea?
Found a mistake, or want a calculator that is not on the site yet? We would love to hear from you.
Contact Us