Statistics Calculator
Calculate basic statistics like mean, median, mode, range, variance, and standard deviation for a set of numbers.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator computes key descriptive statistics for a set of numbers. Follow these steps:
- Enter your data in the input field. Use commas or spaces to separate numbers (e.g.,
12, 15, 20, 22, 30or5 10 15). - Click the Calculate button or press Enter on your keyboard.
- View the results instantly:
- Count – total number of values.
- Sum – total of all values.
- Mean – average (sum divided by count).
- Median – middle value when sorted (average of two middle values for even count).
- Mode – most frequent value(s); shows "No mode" if all appear once.
- Range – difference between maximum and minimum.
- Variance – average squared deviation from the mean (population formula).
- Std Dev – square root of variance, measuring spread.
- Check the formula explanation below the results for a quick breakdown of calculations.
Note: All numeric results are rounded to two decimal places. Enter only valid numbers (e.g., 3.14 or -7).
Previous Results
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Frequently Asked Questions
Population variance divides by N, while sample variance divides by N-1. This calculator uses population variance.
Enter numbers separated by commas or spaces. For example: 12, 15, 20, 22, 30.
If all numbers appear exactly once, the calculator will display 'No mode'.
