Average Calculator

Paste a list of grades, times or measurements and get the arithmetic mean, the count and the sum — not the median or the most common value.

How to use

Type or paste numbers separated by spaces, commas or new lines.
Read the count, the sum and the mean. The mean is sum ÷ count.
Include zeros if they are real observations. A missing value should be left out, not typed as 0.
Open Mean / Median / Mode when you need the middle value or the most frequent one.

How it works

The everyday “average” is the arithmetic mean: add the numbers, divide by how many there are. 2, 4 and 6 sum to 12, so the mean is 4. A class of 70, 80, 90 and 100 has mean 85. That figure is pulled toward extremes. One 20 in an otherwise high set will drag the mean down even if most people scored 90.

That is why a median exists. After sorting, the middle value ignores how far the tails go. This page does not compute it. If your question is “what is typical” on a skewed list (house prices, load times), the statistics tool’s median is the better headline.

Zeros count. 10, 0, 5 has mean 5, not 7.5. Leaving a student who scored zero out of the list is a different choice from typing 0. Blanks are ignored; they are not zeros.

Negatives are ordinary numbers. Temperatures −2, 0, 4 have mean 2/3. There is no “absolute average” here.

The list never leaves the browser. That matters if you paste exam scores or a private measurement set. A blank field is not an average of zero — there is no mean until at least one number is present.

Formula

Mean = (x₁ + x₂ + … + xₙ) ÷ n

Worked examples

Simple list
2, 4, 6 → mean 4, count 3, sum 12
Including zero
10, 0, 5 → mean 5, count 3, sum 15

Useful notes

This is the arithmetic mean only — not median, mode or a weighted mean.
Zeros are values. Empty cells are not.
Nothing you paste is uploaded.

FAQ

How do I find the average of a list of numbers?: Add the numbers together and divide by how many there are. The average of 2, 4 and 6 is 12 ÷ 3 = 4.
Is this a median calculator?: No. The median is the middle value after sorting. This page reports the arithmetic mean only.
Are the numbers sent to a server?: No. The list is averaged in your browser and is not transmitted.
How do I average 70, 80 and 100?: Sum 250, count 3, mean 250 ÷ 3 ≈ 83.3333.
Should I drop outliers before averaging?: Only if the question is no longer “mean of this list.” This tool averages exactly what you paste. Use median on the statistics page if a tail is distorting the story.

Guides

Mean, Median and Mode
The mean follows every value. The median is the middle after sorting. Mode is whatever appears most often. A long tail can make the mean a poor stand-in for “typical.”

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