This mean, median, mode calculator finds the main measures of a data set in one step. Paste or type your numbers and get the mean, median, mode and range, plus quartiles, interquartile range, geometric mean and standard deviation.
How each measure is found
- Mean: add all values and divide by how many there are.
- Median: sort the values; the median is the middle one, or the average of the two middle values when there is an even count.
- Mode: the value that appears most often. A set can have one mode, several modes, or none.
- Range: the largest value minus the smallest.
Worked example
For 3, 7, 7, 2, 9, 4, 7, 10, the sorted list is 2, 3, 4, 7, 7, 7, 9, 10. The mean is 49 ÷ 8 = 6.125, the median is (7 + 7) ÷ 2 = 7, the mode is 7 (it appears three times) and the range is 10 − 2 = 8.
Mean or median?
The mean uses every value, so a few very large or small values can pull it a long way. The median only looks at the middle, which is why it is preferred for skewed data such as house prices and incomes. When mean and median are far apart, the data is skewed.
Frequently asked questions
Can a data set have more than one mode?
Yes. If two or more values tie for most frequent, they are all modes; a set with two is called bimodal.
What if no number repeats?
Then there is no mode, because every value appears only once.
How do I find the median with an even number of values?
Sort the values and average the two in the middle. For 2, 4, 6, 8 the median is (4 + 6) ÷ 2 = 5.
What is the interquartile range?
The difference between the third and first quartiles. It covers the middle 50% of the data and is not affected by extreme values.
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Last reviewed: October 2026.