How many decimal places does the result show?

Up to 4 decimal places. Trailing zeros are trimmed, so an average of exactly 20 shows as '20', not '20.0000'.

Can the list include negative integers?

Yes. Negative integers are added normally, so a list like -10, 10, 5 averages to about 1.6667.

What happens with an empty input?

The tool requires at least one integer and returns an error if the input is empty or contains only blank lines.

How is this different from the Integer Digit Average Calculator?

This tool averages the integers themselves across the whole list into one result. The Digit Average Calculator instead averages each integer's own digits and reports one result per line.

Integer Average Calculator - Mean of a List of Integers

Overview

Introduction

This tool calculates the arithmetic mean of a list of integers, giving you a single average value from a batch of numbers.

Paste in one integer per line and get the mean instantly, formatted cleanly without unnecessary trailing zeros.

What Is Integer Average Calculator?

A calculator that sums every integer in your list and divides by the count of integers to produce the arithmetic mean.

It handles positive and negative integers alike, and formats the result to a readable precision.

How Integer Average Calculator Works

Each non-blank line is parsed as an integer; if any line fails to parse, the tool reports exactly which line was invalid.

All parsed values are summed and divided by the total count to get the mean.

The result is rounded to 4 decimal places and any trailing zeros (and a trailing decimal point) are trimmed for a clean display.

When To Use Integer Average Calculator

Use it whenever you need a quick average of a batch of whole numbers without opening a spreadsheet.

It's useful for sanity-checking statistics code, summarizing survey scores, or averaging counts from a log file.

Often used alongside Integer Digit Average Calculator, Integer Subtraction Calculator and Integer Division Calculator.

Features

Advantages

Handles an entire list at once instead of requiring manual addition and division.
Correctly averages negative and positive integers together.
Clean, trimmed decimal output avoids misleading extra zeros.

Limitations

Only computes a simple arithmetic mean; it does not offer median, mode, or weighted averages.
Extremely large lists or very large integers rely on standard JavaScript number precision (safe up to 2^53).

Examples

A simple whole-number average

Input

10
20
30

Output

An average with negative values

Input

-10
10
5

Output

1.6667

The three values sum to 5, and 5 / 3 rounds to 1.6667 at 4 decimal places.

Best Practices & Notes

Best Practices

Double-check your list has one integer per line with no stray text, since a single bad line will stop the calculation.
Use this tool for quick checks; for statistical analysis beyond the mean, use a dedicated stats tool.

Developer Notes

The mean is computed as a plain floating-point sum divided by count, then formatted with `toFixed(4)` and a trailing-zero trim, so results like an exact integer average print without a decimal point at all.

Integer Average Calculator Use Cases

Averaging a list of scores, counts, or measurements pasted from another source
Sanity-checking an average calculation in application or test code
Quick classroom or homework arithmetic checks

Common Mistakes

Including a stray non-numeric line (like a header or label), which causes a parse error instead of being ignored.
Expecting more than 4 decimal places of precision in the output.
Confusing this with the digit-average calculator, which averages digits within each number rather than the numbers themselves.

Tips

Paste directly from a spreadsheet column; each cell's value on its own line works as long as it's a plain integer.
If you need the average of each number's own digits instead, use the Integer Digit Average Calculator.

Integer Average Calculator