Average (Mean) Calculator
The arithmetic average (mean) represents the central balance point of a collection of values. It is calculated by summing all entries and dividing by the total count of numbers.
Calculated Result
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Formula & Mechanics
Mean = Sum of all values (Σx) / Count of values (n)
Add every single number in the dataset together to obtain the sum, then divide by the total quantity of items entered.
Worked Step-by-Step Example
Scenario: A student scored 78, 85, 92, and 89 on four assignments.
- Sum the numbers: 78 + 85 + 92 + 89 = 344
- Count the entries: 4
- Divide sum by count: 344 ÷ 4 = 86
The average score is 86.
Frequently Asked Questions
How does an outlier affect the average?
The arithmetic mean is sensitive to extreme values. A single unusually high or low number will pull the average toward itself.
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