Everyday math
Find the simple average of up to five numbers.
Enter your numbers to see the answer.
Average calculator guide
The average calculator finds the arithmetic mean of up to five numbers: it adds the values you enter and divides by how many there are. It fits quick everyday tasks such as averaging test scores, a week of temperatures, the last few utility bills, or lap times. The five fields let you compare a handful of figures without a spreadsheet; for longer lists, or when you also want the median, mode, and range, the statistics calculator accepts free-form input. One behaviour to know before you type: a field left at 0 is treated as empty and excluded from the count, so the mean of the three default values uses 3 as the divisor, not 5. That keeps unused boxes from dragging the result down, but it also means a genuine zero in your data will be skipped; the statistics calculator keeps zeros. Results round to two decimals by default.
Average = (sum of the non-zero values) ÷ (number of non-zero values).
Worked example with the defaults: Number 1 = 10, Number 2 = 20, Number 3 = 30, and Numbers 4 and 5 left at 0. The two zero fields are excluded, leaving three values. Add them: 10 + 20 + 30 = 60. Divide by the count: 60 ÷ 3 = 20. The calculator displays 20 with rows showing “Values included 3” and “Total 60”. If the fourth field were changed to 40, the sum would be 100 and the average 100 ÷ 4 = 25.
All five fields should share a unit, and the average comes back in that unit: five prices in dollars give a mean in dollars. Enter plain numbers; decimals and negatives are fine. Because the result is rounded to two decimals, 10, 20, and 25 average to 18.33 rather than the exact 18.333…; raise the precision setting for more digits.
The result follows directly from the numbers you entered, so its accuracy is the accuracy of those inputs. The most common source of a surprising answer is a mismatch between the question you meant to ask and the one the calculator answered, so re-read the field labels if the figure looks wrong. The formula is shown above so you can check the arithmetic yourself. On this page the figure rests entirely on number 1, number 2, number 3, number 4 and number 5, so start there if the average calculator returns something you did not expect.
Good to know: a real data point of 0 is dropped from the count, so averaging 0, 10, and 20 returns 15 here rather than 10; use the statistics calculator when zeros are meaningful. Averaging percentages or rates with different bases misleads: a 50% score on a 10-question quiz and 90% on a 100-question exam should be weighted, not averaged as 70%. The mean is pulled by outliers; one very large value can make the average unrepresentative.
Results are planning estimates. Check the units, product coverage, carrier rules, or local rates before making a purchase or financial decision.
How it works
Find the simple average of up to five numbers. This tool explains the calculation so you can adjust the assumptions to match your situation.
Worked example
With Number 1 = 10 · Number 2 = 20 · Number 3 = 30 · Number 4 = 0 · Number 5 = 0 → 20 (simple average). Change an input above and this example updates with your numbers.
Common questions
20. Add the three numbers to get 60 and divide by 3, the number of values. The calculator shows this with the default inputs, listing 3 values included and a total of 60; the two empty fields are left out of the count.
Add every value, then divide the sum by how many values there are. For four bills of $40, $55, $60, and $45 the sum is $200 and the average is $200 ÷ 4 = $50.
The five fields are optional, and a field showing 0 is treated as unused so that blank boxes do not lower the mean. If zero is one of your data points, use the statistics calculator, which counts every number you type.
In everyday use, average means the arithmetic mean: sum divided by count. The median is the middle value when sorted. For 10, 20, and 90 the mean is 40 but the median is 20; the median resists outliers.
Not on this page, which has five fields. The statistics calculator accepts up to 1,000 comma-, space-, or newline-separated values pasted from a spreadsheet and reports the mean along with the median, mode, range, minimum, and maximum.