Paste your numbers below — the mean, median, mode, quartiles and standard deviation are worked out as you type.
Paste some numbers above to see the statistics.
Use the sample figures when your numbers are a sample of a bigger group (this is Excel’s STDEV.S). Use population when you have every value there is (STDEV.P).
About Statistics Calculator
Paste a list of numbers and this Statistics Calculator works out the whole descriptive set at once: mean, median, mode, range, quartiles, variance, standard deviation, standard error, coefficient of variation and skewness — plus a histogram so you can see the shape of your data.
In Excel you would need AVERAGE, MEDIAN, MODE, STDEV.S, STDEV.P, VAR.S, QUARTILE.INC and SKEW in eight separate cells. Here they all appear together as you type, and the numbers match what Excel gives you, because the same formulas are used.
What you can do with it
- Check homework or coursework — every number a statistics question asks for, in one place
- Summarise a set of measurements from a lab, a survey or a test
- Find the outliers in a list before you use it
- See the shape of your data with the built-in histogram — is it even, or leaning to one side?
- Copy the whole summary into a report with one button
What each number means
- Mean — the ordinary average: add everything up and divide by how many there are
- Median — the middle value once the numbers are in order. Less affected by one very big or very small value than the mean
- Mode — the value that appears most often. Shown as "no repeat" if nothing repeats
- Range — the biggest value minus the smallest
- Standard deviation — how far, on average, the values sit from the mean. A small number means they are bunched together
- Sample vs population — use sample when your numbers are part of a larger group (Excel's STDEV.S), and population when you have every value (Excel's STDEV.P)
- Q1, Q3 and IQR — the quarter points, and the distance between them: where the middle half of your data lives
- Standard error — how much the mean itself would wobble if you took another sample
- Skewness — which way the data leans. Zero is even; a positive number means a long tail to the right
- Outliers — values more than 1.5 × IQR outside the quartiles, the same rule a box plot uses
Features
- Every descriptive statistic in one screen, updating as you type
- Sample and population versions of variance and standard deviation, side by side
- Quartiles that match Excel (QUARTILE.INC)
- Outliers found for you using the Tukey 1.5 × IQR rule
- A histogram with an adjustable number of bars and the mean marked
- Messy data is fine — currency symbols, stray text and thousands separators are ignored
- Choose your decimal places, from 0 to 6
- Your list is saved in your browser, so it is still there next time
- 100% in your browser — nothing is uploaded
How to use it
- Paste your numbers — one per line, or separated by commas or spaces
- (Optional) tick Commas or Spaces if that is how your numbers are separated, and set how many decimal places you want
- Read the results — the mean, median and mode are at the top, the spread below, then the quartiles
- Check the histogram to see the shape, and change the number of bars if you want
- Press Copy all results to paste the summary into your report
