Add all the numbers together and divide by how many numbers there are; that result is the mean, or average. Paste your list into the browser-based average calculator and it returns the mean along with the sum and count instantly, with nothing sent to a server.
The arithmetic mean is the most common kind of average. You total every value in the set and then divide that total by the number of values. For example, the mean of 4, 8 and 15 is (4 + 8 + 15) divided by 3, which is 27 divided by 3, or 9. The formula scales to any list length, and the only thing that changes is how many numbers you are dividing by.
Adding a handful of numbers by hand is easy, but a spreadsheet column of fifty values is where mistakes creep in. The average calculator lets you paste a list separated by commas or spaces and computes the mean, sum and count together, so you can check your work in one step. It runs entirely in your browser, which means your data is never uploaded.
For everyday use they are the same thing: the arithmetic mean is the average you get by adding the numbers and dividing by how many there are.
No. The calculation runs entirely in your browser, so your data never leaves your device.
Yes. You can separate the numbers with commas, spaces or new lines and the tool will read them.