📊 Statistics
Mean, median, mode, standard deviation, and probability.
Statistics is the art of summarizing many numbers with a few honest ones. Feed your list into any tool below — averages, spread, or the most frequent value — and each calculator explains its own view of the same data.
- Average CalculatorCompute the arithmetic mean of a list of numbers
- Median CalculatorFind the middle value of a data set
- Mode CalculatorFind the most frequent value in a data set
- Variance CalculatorPopulation variance of a data set
- Standard Deviation CalculatorPopulation standard deviation of a data set
- Sum CalculatorAdd up a list of numbers
- Mean CalculatorArithmetic mean of a data set
- Permutation CalculatornPr — arrangements where order matters
- Combination CalculatornCr — selections where order does not matter
Frequently asked questions
What is the difference between mean, median and mode?
The mean is the arithmetic average, the median is the middle value after sorting, and the mode is the most frequent entry. A list of 3, 5, 9 has mean 5.67, median 5 and no mode at all — one dataset, three defensible answers.
Which statistics calculator handles which job?
One overall number: the average. Central tendency that survives outliers: median. The most common value: mode. Spread of the data: variance or standard deviation. Enter the same comma-separated list into each tool and compare the different views.
What does standard deviation say about my data?
How far the values typically sit from their average. Test scores between 60 and 80 may all average near 70, and the standard deviation tells you whether most students hug that 70 or scatter far around it — beyond any single average can say.