Average Calculator: Mean, Median and Range
Enter a list of numbers to calculate the mean, median, sum, and range.
Find the arithmetic mean of a list and compare it with the median, sum, minimum and maximum. Every entered observation has equal weight.
Formula: Mean = sum of values ÷ number of values. Sort the list to find the median.
For 4, 8, 15, 16, 23, 42: sum = 108, count = 6 and mean = 18. The median is (15 + 16) ÷ 2 = 15.5.
Separate numbers with spaces, commas or semicolons. Use a decimal point, such as 1.5; commas separate values. Enter at most 10,000 finite numbers.
What This Average Calculator Does
This tool calculates the average (mean) of any list of numbers, along with the sum, count, median, minimum, and maximum — useful for grades, survey data, sports statistics, or any quick set of figures.
How It Works
The mean is the sum of all numbers divided by how many numbers there are. The median is the middle value when the numbers are sorted (or the average of the two middle values if there's an even count). Min and max show the smallest and largest numbers you entered.
Frequently Asked Questions
What format should I use to enter numbers?
You can separate numbers with commas, spaces, or new lines — the calculator handles all of these automatically.
What's the difference between mean and median?
The mean is the sum divided by the count, while the median is the middle value when the numbers are sorted. The median is less affected by extreme outliers than the mean.
Can I enter negative numbers or decimals?
Yes, the calculator accepts negative numbers and decimal values.
Method and examples
Zero and missing observations are different
For 0, 10, 20, the mean is 10 because all three values count. If the first observation is missing, the mean of the two known values is 15. Do not enter zero merely to fill a missing measurement. This calculator cannot infer missing data or decide whether an observation should be excluded.
Read the median when a few values dominate
For 10, 10, 10, 100, the mean is 32.5 but the median is 10. Both answers are correct: they describe different features of the list. An unusually large observation pulls the mean upward. Check whether it is a real observation or an entry mistake before removing it.
Do not average averages without their counts
If one class of 10 students averages 80 and another class of 30 averages 60, the combined mean is (10 × 80 + 30 × 60) ÷ 40 = 65, not 70. Use a weighted average for groups of unequal size. Entering only 80 and 60 here gives each group equal weight.
Interpret precision and input separators
Negative numbers and scientific notation are accepted. Values and statistics display with limited significant digits; repeated decimal results are approximate. A comma in 1,000 creates two observations, 1 and 0, so enter one thousand as 1000. Invalid or non-finite input is rejected rather than silently omitted.
Maintained by: Muhammad Bhutto · 2026-10-17 · Methodology · Report an error