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Math

Average (Mean) Calculator

The arithmetic mean sums values and divides by count. It summarizes datasets like test scores, sensor readings, and survey responses.

Inputs

Enter your values below. Results update when you calculate.

About Average / Mean

The arithmetic mean sums values and divides by count. It summarizes datasets like test scores, sensor readings, and survey responses.

Outliers skew the mean; median may be better for skewed data though this tool focuses on mean plus min/max when offered.

Enter clean numeric lists separated as the form instructs.

How to use this tool

Paste or type numbers separated by commas or spaces. Calculate for mean and extrema.

Formula & methodology

This average (mean) calculator applies the standard relationship below. Intermediate values are kept at full precision; only the displayed result is rounded.

mean = (sum of values) / count; min/max = smallest/largest

Tips for accurate results

  • Remove currency symbols before averaging.
  • Empty list should error—enter at least one number.
  • Weighted averages need separate weight inputs if not supported.
  • Round mean appropriately for reporting context.

Frequently asked questions

Average of 10, 20, 30?

20.

Median included?

This tool emphasizes mean; median may not be shown.

Free?

Yes.

Decimals?

Supported if entered consistently.

Further reading

Guides that explain the ideas behind this calculator.

All guides →
Math 3 min read Percentage change vs. percentage points: the mistake in most headlines From 5% to 7% is +2 points and +40% at the same time. Which one a headline chooses changes the story — here is how to read them correctly.

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