Mean, Median and Mode Calculator
All three measures of central tendency from one data set.
Mean
19.2857142857
7 values
Median
18
Mode
15
Range
18
First quartile (Q1)
15
Third quartile (Q3)
22.5
Interquartile range
7.5
Mean = sum ÷ n. Median = middle value once sorted. Mode = the most frequent value.
- The most frequent value appears 2 times.
- Quartiles use linear interpolation, matching Excel PERCENTILE and NumPy defaults.
| Position | Sorted value |
|---|---|
| 1 | 12 |
| 2 | 15 |
| 3 | 15 |
| 4 | 18 |
| 5 | 21 |
| 6 | 24 |
| 7 | 30 |
What does Mean, Median and Mode Calculator do?
Enter a data set to get the mean, median and mode together, along with range, quartiles and a sorted view of the values. Seeing all three at once makes it obvious when a distribution is skewed.
How to Use Mean, Median and Mode Calculator
- 1Enter your dataSeparated by commas, spaces or line breaks.
- 2Read the three measuresMean, median and mode are calculated together.
- 3Check the spreadQuartiles and range tell you how tightly the data clusters.
Key Features
- Mean, median and every mode (including multi-modal data sets)
- Range, first and third quartiles and the interquartile range
- Sorted data shown so you can verify the median by eye
- Correctly reports "no mode" when every value is unique
- Explains which measure describes your data best
Frequently Asked Questions
What is the difference between mean, median and mode?
Mean is the arithmetic average, median is the middle value once sorted, and mode is the value that appears most often. For 2, 3, 3, 4, 100 the mean is 22.4, the median is 3 and the mode is 3 — the median describes the data far better.
How do I find the median of an even number of values?
Sort them and take the average of the two middle values. For 4, 7, 9, 12 the median is (7 + 9) ÷ 2 = 8.
Can a data set have more than one mode?
Yes. If two or more values tie for the highest frequency, the set is bimodal or multimodal and all of them are shown. If every value appears once, there is no mode at all.
What are quartiles?
The values that split sorted data into four equal parts. Q1 is the 25th percentile, Q3 the 75th. The gap between them, the interquartile range, is a robust measure of spread that ignores outliers.
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