Math Calculator

Average Calculator

Enter a list of numbers separated by commas, spaces, semicolons, or new lines to calculate its average and supporting summary values.

Find the average, sum, and range of numbers

Arithmetic average formula

Average (mean) = sum of all values / number of values. The range runs from the minimum value to the maximum value.

Flexible list input

Accepts common ways of separating a number list.

Summary checks

Shows count, sum, minimum, and maximum.

Precise mean

Keeps decimal precision for further calculation.

How to calculate an average

The arithmetic average, also called the mean, is the total of all entered values divided by the number of values. It is useful when every observation should carry equal weight, such as a simple list of scores, daily quantities, measurements, or invoice amounts.

Paste values in a comma-separated list, or separate them with spaces, semicolons, or new lines. The calculator ignores empty separators and shows the count, sum, minimum, and maximum alongside the mean so you can quickly check whether a missing, duplicated, or unusual number may affect the result.

A simple mean is not always the correct metric. Weighted grades, weighted prices, interest rates, grouped data, and percentages with different denominators may need a weighted average. Large outliers can also make the mean less representative, so compare it with the range and consider a median when appropriate.

Average calculator inputs

InputWhat it meansPlanning note
ValuesThe numbers to averageSeparate values with commas, spaces, semicolons, or lines.
CountNumber of valid values enteredCheck this against the intended number of observations.
SumTotal of valid valuesUseful for auditing the mean calculation.
AverageSum divided by countUse a weighted calculation when observations have different weights.

Common use cases

Score review

Find a simple average of quizzes or assignments.

Budget tracking

Average recurring costs across months.

Measurement summary

Calculate a mean from repeated test or field readings.

Frequently asked questions

How do I find an average?

Add the values and divide the total by how many values there are.

Can I paste values on separate lines?

Yes. Line breaks, commas, spaces, and semicolons are accepted.

Does this calculate a weighted average?

No. Every entered value has equal weight; use a weighted formula when weights differ.

Why does one value change the result so much?

A mean is sensitive to unusually high or low values; review the range and source data.

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Last reviewed: September 28, 2026. Results are calculations from values you enter. Follow the grading policy, course catalog, instructor instructions, or institutional rules that apply to your specific situation.

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