Statistics Calculator
Numbers
Enter one per row (0)
Count
0
Sum
0
Mean
0
Median
0
Mode
No mode
Minimum
0
Maximum
0
Range
0
Variance (population)
0
Std. Deviation (population)
0
Variance (sample)
0
Std. Deviation (sample)
0
How to Use
Paste or type numbers into the input area, separated by commas, spaces, semicolons, tabs, or new lines. All descriptive statistics — count, sum, mean, median, mode, minimum, maximum, range, variance, and standard deviation — update instantly as you type. Negative numbers and decimals are supported.
What Are Descriptive Statistics
Descriptive statistics summarize a dataset with a few numbers. Measures of central tendency (mean, median, mode) describe where the middle of the data is. Measures of spread (range, variance, standard deviation) describe how spread out the values are. Together they give a quick picture of the dataset without needing to inspect every value.
Formulas
Mean is the sum of all values divided by the count. Median is the middle value after sorting (or the average of the two middle values when the count is even). Mode is the most frequently occurring value (or values, if tied). Variance is the average squared deviation from the mean; standard deviation is the square root of variance. Population variance divides by N; sample variance divides by N−1 (Bessel's correction) and is used when the numbers are a sample drawn from a larger population.
Common Use Cases
- Students solving homework problems in statistics, algebra, or science classes.
- Teachers preparing examples or verifying answers while creating worksheets.
- Data analysts doing quick sanity checks without opening a spreadsheet.
- Survey researchers summarizing numerical responses.
- Sports and hobby enthusiasts analyzing scores, times, or measurements.
- QA and engineering teams summarizing benchmark or measurement results.
Tips
- If all values are unique, there is no mode — this is reported as "No mode".
- Multiple modes are shown when two or more values tie for the highest frequency (multimodal distribution).
- Use sample statistics (N−1 divisor) when your numbers are a random sample from a larger population.
- Use population statistics (N divisor) when the numbers represent the entire population of interest.
- Mixing separators is fine: "1, 2 3; 4\n5" is parsed correctly.
Privacy
All calculations happen in your browser. Your numbers are never sent to any server or stored anywhere.
FAQ
Should I use population or sample statistics?
Use population statistics (divide by N) when your numbers represent the entire group of interest, and sample statistics (divide by N−1, Bessel's correction) when they are a subset drawn from a larger population. Both variance and standard deviation are shown, so pick the one that fits your case.
Are the numbers I enter sent to a server?
No. Every calculation — mean, median, standard deviation, and the rest — runs in your browser, and your numbers are never sent to or stored on any server. You can safely enter sensitive data like experiment results or performance figures.
What separators can I use between numbers?
You can separate values with commas, spaces, semicolons, tabs, or new lines. Mixed separators are parsed correctly (e.g., "1, 2 3; 4"), so pasting straight from a spreadsheet works fine.
Why does the mode show "No mode"?
When every value occurs the same number of times (no repeats), there is no mode, so it reports "No mode". If several values tie for the highest frequency, all of them are shown as modes instead.
Can it handle negative numbers and decimals?
Yes. Both negatives and decimals are supported. As you type, every metric from count and sum through variance and standard deviation recalculates in real time.