- 1Enter your data points in the text area, separated by commas, spaces, or line breaks (e.g., 10, 20, 30).
- 2The calculator instantly displays the arithmetic mean, the sum of all values, and the number of data points.
- 3Edit or add values at any time โ the result updates automatically.
The arithmetic mean is the most common measure of central tendency. It is calculated by adding all values in a dataset and dividing by the number of values. The mean provides a single representative value that summarizes the entire dataset. It is sensitive to extreme values (outliers), which can pull the mean higher or lower than the majority of the data.
Sum all values and divide by the total number of values.
Mean = (xโ + xโ + ... + xโ) / n | Example: (10 + 20 + 30) / 3 = 20Sum of all values divided by how many values there are.
Mean = (ฮฃ values) รท NScores: 78, 85, 92, 88, 67 โ Sum = 410 โ Mean = 410 / 5Sum = 108; Count = 6; Mean = 108 / 6Sum = 130; Count = 4; Mean = 130 / 4- The mean is sensitive to outliers. A single very large or very small value can shift the mean significantly away from the rest of the data.
- For skewed distributions, the median may be a more representative measure of the "typical" value than the mean.
- This calculator computes the unweighted arithmetic mean. If your values carry different importance or weights, use the Weighted Average calculator instead.
Is "mean" the same as "average"?
In everyday language, "average" usually refers to the arithmetic mean. However, THE CALC provides a separate Weighted Average calculator for situations where each data point has a different weight or importance.
What data formats does this calculator accept?
You can separate values with commas (10, 20, 30), spaces (10 20 30), or line breaks. The calculator accepts decimals and negative numbers.
What separators can I use between numbers?
Commas, spaces, tabs, and line breaks all work; they are normalised to spaces before parsing.
What happens if I type a non-numeric token?
Parsing stops and the calculator reports the offending token instead of a result โ every entry must be a valid number.