EasyUnitTools

Average Calculator

Enter as many numbers as you like — the average, sum, count, smallest and largest values update as you type.

Average (mean)

25

100 ÷ 4

Sum

100

Count

4

Minimum

10

Maximum

40

How is this calculated?

Formula

Average (mean) = sum of all values ÷ how many values there are

Calculation

10 + 20 + 30 + 40 = 100
100 ÷ 4 = 25

Result

Average = 25

  • Smallest value 10, largest value 40.
  • Every value counts equally; this is the arithmetic mean, not the median.

Formula: Average = Sum of values ÷ Count of values.

Worked example

Take the numbers 10, 20, 30 and 40. Adding them gives 100, and there are 4 of them, so 100 ÷ 4 = 25. The average is 25 even though no single value equals 25.

With 4, 4, 4 and 20 the sum is 32 and the average is 8 — one unusually large value pulls the mean well above most of the list, which is why the smallest and largest are shown next to the answer.

About averages

How do you calculate an average?
Add every number together, then divide the total by how many numbers there are.
Mean, median or mode?
This calculator gives the mean. The median is the middle value once sorted, and the mode is the value that appears most often — they can differ a lot when a list has outliers.
Do negatives and decimals work?
Yes. Negative values, decimals and very large numbers are all handled, and blank rows are ignored.
How is the answer rounded?
Results are shown to at most six decimal places; the calculation itself uses the full precision of the values you typed.

Related tools

Frequently asked questions

What kind of average is this?
The arithmetic mean: the sum of all values divided by how many values there are.
Can I use negative or decimal numbers?
Yes. Negatives, decimals and very large values are all supported.