Average Calculator
Calculate the arithmetic mean of a set of numbers, along with the count, sum, minimum, and maximum.
How to use this calculator
- Type or paste your numbers, separated by commas or spaces.
- Press Calculate to get the mean plus the sum, count, minimum, and maximum.
The formula
Mean = (Sum of all values) ÷ (Number of values)- Sum
- All values added together
- Count
- How many values there are
How it works
The arithmetic mean distributes the total evenly across every entry. It is the most common kind of average and the one meant when people say 'average' without qualification.
The mean is sensitive to extreme values: a single very large or small entry pulls it toward itself. For skewed data the median (middle value) is often a better summary.
Worked example
Five practice test scores: 72, 85, 90, 68, 95.
- 1Sum = 72 + 85 + 90 + 68 + 95 = 410
- 2Count = 5
- 3410 ÷ 5 = 82
The average score is 82.
When this calculator is useful
- Grades and test scores
- Average monthly spending
- Average speed over equal time periods
- Summarizing measurements
Frequently asked questions
What is the difference between mean, median, and mode?
Mean is the sum divided by the count, median is the middle value when sorted, and mode is the most frequent value.
Can I average negative numbers?
Yes. Add them as usual — negative values reduce the sum.