The arithmetic mean (average) is the sum of all values divided by the count of values. It is the most commonly used measure of central tendency and is useful for summarising a dataset with a single representative value. This calculator also shows the sum, count, minimum and maximum of the entered values.

1. Enter your numbers in the input field.
2. Separate values with commas, spaces or semicolons.
3. Click Calculate to see the mean and summary statistics.

Numbers: 12, 45, 7, 89, 23, 56
Count: 6 | Sum: 232 | Mean: 38.67 | Min: 7 | Max: 89

The mean is sensitive to outliers — a single very large or very small value can pull the average significantly. If your dataset has extreme outliers, consider also looking at the median (middle value) for a more representative central tendency.

• Including non-numeric characters — only numbers, commas, spaces and semicolons are accepted.
• Confusing mean with median — the mean is the arithmetic average; the median is the middle value when sorted.

What is the difference between mean, median and mode?

The mean is the arithmetic average. The median is the middle value when the numbers are sorted. The mode is the most frequently occurring value. For symmetric distributions they are similar; for skewed data they can differ significantly.

How many numbers can I enter?

There is no hard limit. Separate values with commas, spaces or semicolons.

Can I enter negative numbers or decimals?

Yes. The calculator handles any valid numbers including negatives and decimals.