# Average Calculator

> Find the arithmetic mean, sum, count, minimum, and maximum of a number list.

Page: https://freecalculator.tech/tools/average-calculator
Last reviewed: 2026-10-23

## How do I calculate an average?

The arithmetic mean is the sum of the values divided by how many values there are.

## Formula

Average (arithmetic mean) = sum of all values ÷ number of values.

- Methodology type: scientific equation.
- Methodology: NIST measures of location, unweighted arithmetic mean. Mean = sum ÷ count.
- Average (arithmetic mean) = sum of all values ÷ number of values.
- Inputs used: Numbers.
- Edge handling: Numbers is required..

## Inputs

- Numbers

## Worked example: Average of 12, 18, 25, and 30

Their sum is 85; divided by 4, the average is 21.25.
1. Start with Numbers: 12, 18, 25, 30.
2. Apply the method: Average (arithmetic mean) = sum of all values ÷ number of values.
3. Their sum is 85; divided by 4, the average is 21.25.

## Common questions

### How do I calculate an average?

The arithmetic mean is the sum of the values divided by how many values there are. Check the formula, example, and limitations on this page before using the result for a real math decision.

### Can I include negative numbers?

Yes. Negative and decimal values are supported.

### Which type of average is used?

This calculator uses the arithmetic mean. Check the formula, example, and limitations on this page before using the result for a real math decision.

### Does this show the median?

No. Use the dedicated median page; this page calculates the arithmetic mean and range endpoints.

### How do I use the Average Calculator?

Enter the required values for Numbers. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Average Calculator use?

Average (arithmetic mean) = sum of all values ÷ number of values. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.

## Limitations and assumptions

- Unweighted finite numbers only; no missing-data or survey-weight correction.
- Extreme values can strongly affect the mean.
- For education and operational analysis only. No diagnosis, treatment recommendations, prescribing, dosing instructions, or reimbursement entitlement. Scientific calculations require appropriate laboratory verification; operational estimates do not replace local clinical, safety or financial policies.
- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this average calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- NIST — https://www.itl.nist.gov/div898/handbook/eda/section3/eda351.htm

## Cite this page

- APA: Free Calculator. (2026, October 23). Average Calculator. https://freecalculator.tech/tools/average-calculator
- MLA: "Average Calculator." Free Calculator, 23 Oct. 2026, https://freecalculator.tech/tools/average-calculator.
- Link: Average Calculator — Free Calculator, https://freecalculator.tech/tools/average-calculator