Percentages and basic math

Average calculator

Enter a list of numbers to calculate the arithmetic mean, sum and number of values.

Calculate the average

Separate numbers with spaces, line breaks, semicolons or commas. Decimal numbers can use a comma or a dot. The input 4,5,6 is interpreted as 4, 5 and 6.

What the average calculator shows

The average calculator shows the arithmetic mean, the sum of the numbers and how many values were included. That makes it easier to check both the main result and the parts behind it.

How to use the calculator

Type the numbers in one field and press Calculate. Numbers can be separated with spaces, line breaks, semicolons, commas or the word "and". The result appears when the input can be parsed as numbers.

How the mean is calculated

The arithmetic mean is calculated by adding the numbers and dividing the sum by the count. If the numbers are 4, 5 and 6, the sum is 15 and the count is 3, so the mean is 15 / 3 = 5.

Example calculations

  • 4, 5 and 6 -> sum 15, count 3, average 5.
  • 10, 20, 30 and 40 -> sum 100, count 4, average 25.
  • 7.5 and 8.5 -> sum 16, count 2, average 8.
  • -1.0 and 3 -> sum 2, count 2, average 1.

Input formats and separators

Numbers can be separated with spaces, line breaks, semicolons or commas. Decimal numbers can use a comma or a dot when the list is clear. The input 4,5,6 is interpreted as 4, 5 and 6, while 4,5; 6 is interpreted as 4.5 and 6.

Mean vs other averages

This calculator only calculates the arithmetic mean. It does not calculate median, mode, weighted average or standard deviation. Very large or very small values can affect the arithmetic mean strongly.

Limitations

The calculator is intended for basic arithmetic and a quick view of a set of numbers. It does not perform official statistical analysis, remove outliers or decide which measure of center is best for a situation.

Frequently asked questions

Can I enter decimal numbers?

Yes. You can use a decimal comma or decimal dot when the rest of the input is clear.

Does the calculator calculate median or mode?

No. It calculates only the arithmetic mean and shows the sum and count.

Can the average be calculated for one number?

Yes. The arithmetic mean of one number is the same number.

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