Type your numbers separated by commas in the input field, then press Calculate. The tool finds the mean, median, mode, range, and standard deviation for your dataset. You can enter as few as 2 values or as many as you like. The bar chart updates to show the distribution of your data visually.
Mean: Add all values and divide by how many there are. This is the arithmetic average.
Median: Sort the values from smallest to largest and pick the middle one. If there are two middle values, average them.
Mode: The value that appears most often. A dataset can have no mode, one mode, or several modes.
Range: Subtract the smallest value from the largest. This tells you how spread out the data is.
| Situation | Best Measure | Why |
|---|---|---|
| Test scores in a class | Mean | Data is usually evenly spread |
| Income or house prices | Median | Outliers like very high earners skew the mean |
| Most popular shoe size | Mode | You want the most common item, not an average |
| How consistent data is | Range or standard deviation | Measures how much values vary |
With an odd count: sort the values and take the exact middle one. For 3, 7, 9, 11, 15, the median is 9 (the 3rd of 5 values).
With an even count: sort the values and average the two middle ones. For 3, 7, 9, 11, the median is (7 + 9) / 2 = 8.
