Basic list
Input
10, 20, 30, 40Output
Mean 25 · Sum 100 · Count 410 + 20 + 30 + 40 = 100; 100 ÷ 4 = 25.
Paste a list of numbers and get the arithmetic mean instantly. Every value counts equally: mean = sum ÷ count.
Runs in your browser · No data stored · No signup
In everyday US usage, “average” is the arithmetic mean. For 10, 20, 30, and 40 the sum is 100, the count is 4, and the mean is 25.
Every number in the list has the same weight. That is what this calculator does. A weighted average, a GPA, or a percent-of calculation is a different question.
Use this page when every value should count equally. If some scores matter more, you need weights—not sum ÷ count.
Write the numbers you want to average. Separate them with commas, spaces, or one value per line.
The sum is every value added together. For 10, 20, 30, 40 the sum is 100.
Count is n, the number of values in the list. That example has 4 values.
Mean = 100 ÷ 4 = 25. The calculator shows this working from your list as you paste.
Paste from a notes app, CSV cell, or spreadsheet column. Commas, spaces, tabs, and new lines are all separators. A comma with no space and three digits—1,000—is one thousand. A comma followed by a space—1, 000—is a list separator, so that becomes 1 and 0. Tokens that are not numbers (hello, N/A, labels) are listed as ignored instead of disappearing.
Formula
Average (mean) = Σxᵢ / nA list of ordinary values plus one very large or very small number still uses every value in the mean. Check the median on the same run. If they disagree a lot, the mean is not a good “typical” number.
If homework and exams count differently, sum ÷ count is the wrong formula. Use the GPA Calculator for credit-hour grades.
Labels, N/A, and words are listed as ignored. Confirm the detected count matches how many numbers you meant to average.
Input
10, 20, 30, 40Output
Mean 25 · Sum 100 · Count 410 + 20 + 30 + 40 = 100; 100 ÷ 4 = 25.
Input
78, 84, 90, 88, 92Output
Mean 86.4Unweighted quiz or test scores. If exams count more than homework, that is a weighted grade—not this tool.
Input
-4, -1, 0, 3.5, 6Output
Mean 0.9Zeros, decimals, and negatives are part of the sum and the count.
Input
12
15
18
21
24Output
Mean 18 · Count 5Copy a column from Excel or Google Sheets and paste. Tabs and new lines both work.
Input
12.50, 8.75, 20, 4.25Output
Mean 11.375Paste receipt totals or a spending column. Decimals stay in the sum.
Input
42000, 45000, 48000, 51000, 250000Output
Mean 87,200 · Median 48,000One large value pulls the mean up. The median stays near the typical salary. Compare both before calling either “typical.”
The mean is the answer. The rest describes the same list.
| Result | Meaning |
|---|---|
| Mean | Arithmetic average (sum ÷ count) |
| Count | Number of values |
| Sum | Total of all values |
| Minimum | Smallest value |
| Maximum | Largest value |
| Range | Maximum minus minimum |
| Median | Middle value after sorting |
| Mode | Most frequent value, if any value repeats |
This calculator is for the equal-weight mean of a pasted list. Use a different tool when the question is not sum ÷ count.
| Related tool | Use this tool when | Use related tool when |
|---|---|---|
| GPA Calculator | You have unweighted scores or any equal-weight list. | You have letter grades and credit hours, or weighted course categories. |
| Percentage Calculator | You already have numbers and want their mean. | You need percent of, percent change, or reverse percentage. |
| Standard Deviation Calculator | You want the average and a quick min/max/range check. | The question is spread: sample vs population standard deviation. |
| Mean Median Mode Calculator | You mainly want the average, with median/mode as a check. | If you need mean, median, and mode together, use the Mean Median Mode Calculator. |
Advertisement
On this page, an average is the arithmetic mean: the sum of the numbers divided by how many numbers you have.
In everyday math and most US classrooms, yes. Average means the arithmetic mean. Median and mode are other summaries; they are not this calculator’s primary answer.
Add the values (the sum), count them (n), then divide: mean = sum ÷ n. Paste the list above to see the working for your numbers.
Yes. Separate values with commas, spaces, tabs, or new lines. Copying a spreadsheet column usually works.
Yes. Decimal values are included in the sum and the count like any other number.
Yes. Negatives and zeros are part of the mean. They are not dropped.
Tokens that are not numbers—such as hello or N/A—are listed as ignored. They are not included in the mean. Check the detected count.
When one extreme value warps the story, as with incomes or house prices. Compare the mean to the median shown in the results.
The mean uses every value (sum ÷ count). The median is the middle value after sorting, so a single outlier moves it less. If you need mean, median, and mode together, use the Mean Median Mode Calculator.
No. This tool calculates the simple arithmetic mean. For letter grades and credit hours, use the GPA Calculator. A weighted average needs a value and a weight for each row.
The list is parsed and averaged in your browser. Numbers are not uploaded to EverydayTools servers for this calculation.
Mean uses sum ÷ count on parsed finite numbers. Display precision is the decimal-places setting.
Parsing and the mean update in the browser after you paste or type.
Educational calculator for the equal-weight arithmetic mean. Not a weighted-average, GPA, or official statistics package.
Advertisement
Reviewed by EverydayTools Editorial Team on 2026-09-15.