Mean, Median, Mode Calculator
Enter a set of numbers to find the mean, median, and mode with explanations of which measure is most appropriate for your data.
Central Tendency
Mean, median, and mode are three measures of central tendency — each tells you something different about your data.
Mean (average):
Mean = Sum of all values / Number of values
- Best for: symmetric data without outliers
- Affected by: extreme values (outliers)
Median (middle value): Sort the data, then find the middle value. If even count, average the two middle values.
- Best for: skewed data or data with outliers
- Not affected by: extreme values
Mode (most frequent): The value that appears most often. A dataset can have no mode, one mode, or multiple modes.
- Best for: categorical data, finding the “typical” value
- Not affected by: extreme values
When to use which:
| Situation | Best Measure |
|---|---|
| Symmetric data (test scores) | Mean |
| Skewed data (home prices, salaries) | Median |
| Categorical data (favorite color) | Mode |
| Data with outliers | Median |
| All values equally important | Mean |
Example: Home prices: $150K, $175K, $200K, $210K, $2.5M
- Mean: $647K (misleading — pulled up by the $2.5M outlier)
- Median: $200K (better representation of typical price)