How do I calculate the mean of a list of numbers?

Add all the numbers together to get the sum, then divide by the count of numbers. The Average Calculator does this automatically and also shows the median, mode and range.

What is the difference between mean, median and mode?

The mean is the arithmetic average, the median is the middle value when the data is sorted, and the mode is the value that appears most often. Each summarises a data set in a different way.

When should I use the median instead of the mean?

Use the median when the data is skewed or contains outliers — for example house prices or salaries — because a few extreme values can distort the mean while the median stays representative.

What happens if my data has no repeated values?

Then there is no mode and the calculator reports none. If several values tie for the highest frequency, all of them are shown as modes.

What number separators can I use?

You can separate numbers with commas, spaces or new lines, so you can paste a column straight from a spreadsheet. Any non-numeric text is ignored automatically.

Average Calculator 2026 — Mean, Median, Mode & Range

About the Average Calculator

The Average Calculator computes every common measure of a data set at once: the mean, median, mode and range, plus the sum, count, minimum, maximum and standard deviation. Paste numbers separated by commas, spaces or new lines and press Calculate Averages to see the results — perfect for grades, test scores, expenses, survey data and statistics homework.

Mean, median and mode explained

Mean — the arithmetic average: add all values and divide by how many there are.
Median — the middle value when the numbers are sorted (the average of the two middle values if the count is even).
Mode — the value (or values) that appears most often. A set can have one mode, several, or none.
Range — the difference between the largest and smallest value.

For the set 12, 7, 9, 15, 7, 10 the mean is 10, the median is 9.5, the mode is 7 and the range is 8.

When to use the mean vs the median

The mean is best for symmetric data without extreme values. The median is more representative when the data is skewed or contains outliers — for example, average house prices or salaries, where a few very high values would pull the mean upward. Reporting both gives a fuller picture.

Standard deviation

Standard deviation measures how spread out the numbers are around the mean. A small σ means values cluster near the average; a large σ means they are widely dispersed. This calculator reports the population standard deviation.

Frequently Asked Questions

How do I calculate the mean? Add all the numbers together and divide by how many numbers there are.

What if there is no repeating value? Then the data set has no mode, and the calculator reports "none".

What separators can I use? Commas, spaces and new lines all work, so you can paste a column from a spreadsheet directly.

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Important Note: This tool is intended to provide estimates and should not be used as a substitute for professional advice. Information generated by these calculators may be incomplete and does not account for all individual circumstances. Always seek the counsel of a certified expert (such as a financial advisor, healthcare provider, or licensed engineer) before taking action based on these results.

Related Calculators

Standard Deviation Calculator — Variance and standard deviation in detail.
Percentage Calculator — Percentages, increases and decreases.
Ratio Calculator — Simplify ratios and solve proportions.

📊 Average Calculator