Average CalculatorFree online math calculator — instant results, no sign-up
Average of a list of numbers.
About the Average Calculator
The Average Calculator computes the arithmetic mean, total sum, and item count for any set of numbers. It is commonly used by students, researchers, and professionals looking to summarize numeric data points quickly.
- Numbers
- A list of numeric values separated by commas, spaces, or line breaks; accepts integers and decimals.
Formula and method
Average = (∑ x) / n
- ∑ xSum of all numbers in the dataset
- nTotal count of numbers in the dataset
The calculator parses the input string into an array of individual numbers, adds them together using a sum accumulator, and counts the entries. The sum is divided by the total count to compute the mean, with the average formatted to up to six decimal places.
Worked example
These are the calculator's starting values and the results it actually produces for them.
Inputs
- Numbers10, 20, 30, 45
Results
- Average26.25
- Sum105
- Count4
How to use the Average Calculator
- 1Parse the input text to identify and extract each valid number.
- 2Count the total quantity of numbers entered (Count).
- 3Add all extracted numbers together to calculate the total (Sum).
- 4Divide the sum by the count to determine the arithmetic mean (Average).
Reading your result
The Average displays the central value of your dataset if all values were distributed evenly. The Sum indicates the overall total of all entries combined, while the Count confirms how many numbers were included in the calculation.
Limitations
This tool calculates only the standard arithmetic mean and does not provide weighted averages, medians, or modes. It is also sensitive to extreme outliers, which can pull the mean away from the visual center of skewed datasets.
Common questions
What separates the numbers in the input field?+
You can separate numbers using commas, spaces, or new lines. The tool automatically parses standard delimited numeric values.
How does this average differ from a median?+
The average (arithmetic mean) sums all values and divides by the count, whereas the median is the physical middle value when numbers are sorted in order.
Can I include negative numbers or decimals?+
Yes, both negative numbers and decimals are fully supported and will be factored into the sum and average.
Does the calculator save my information?+
Calculations run in your browser. While signed in, inputs and results are automatically recorded in account history; saving a result creates a separate saved record.
Further reading
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Results are estimates for informational purposes and are not financial, medical or legal advice.