Average Calculator

Paste or type your numbers and instantly see the mean, median, mode, range and more — no button needed.

⚡ Runs entirely in your browser

Nothing calculated yet — enter some numbers above.

Count
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Sum
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Minimum
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Maximum
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Range
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Std deviation (population)
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Std deviation (sample)
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Variance (population)
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How the average calculator works

Everything updates the moment you type — no button to press, no waiting.

1

Enter your numbers

Separate values with commas, spaces, tabs or new lines. Negatives and decimals are welcome.

2

See every statistic

Mean, median, mode, range, sum, count, min, max and standard deviation update instantly.

3

Copy or download

Grab the full results with the Copy button or save them as a text file — nothing is ever uploaded.

What each statistic means

The mean (average) is the sum of all values divided by how many there are. The median is the middle value when the numbers are sorted — with an even count it's the average of the two middle values. The mode is the value that appears most often; if several values tie, they're all shown, and if no value repeats there is no mode.

Range is the difference between the largest and smallest value, while sum, count, minimum and maximum describe the set at a glance. Standard deviation measures how spread out the numbers are: the population version divides by the count (n), and the sample version divides by n − 1, which is the right choice when your numbers are a sample drawn from a larger group.

This tool is handy for students checking homework, teachers grading, and anyone summarising a set of measurements, prices or scores.

🔒

Private by design. Your numbers never leave your device. All calculations happen right here in your browser — nothing is uploaded or stored.

Frequently Asked Questions

What's the difference between mean, median and mode? ▼
The mean is the arithmetic average — the sum of every value divided by how many there are. The median is the middle value once the numbers are sorted. The mode is the value that appears most often. They can all differ, and each summarises the data in a different way.
How is the median found when there's an even count? ▼
The numbers are sorted and the middle one is taken. With an even count there are two middle values, so the median is their average — for example the median of 10, 20, 30, 40 is (20 + 30) ÷ 2 = 25.
What happens if no value repeats? ▼
Then there is no mode and the tool shows 'None'. If several values tie for the most frequent, every one of them is listed as a mode.
Can I use decimals and negative numbers? ▼
Yes. Decimals and negatives are fully supported, and you can separate values with commas, spaces, tabs or new lines. Anything that isn't a valid number is simply ignored.
What's the difference between population and sample standard deviation? ▼
Both measure how spread out the numbers are. The population version divides by the count (n) and is right when your numbers are the whole group. The sample version divides by n − 1 and is the correct choice when your numbers are a sample drawn from a larger population.

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