Average Calculator
Paste or type a list of numbers and get every kind of average at once: the mean, median and mode, plus the range, sum, count and standard deviation. Separate numbers with commas, spaces or new lines; results update as you type.
Enter your numbers
Commas, spaces, semicolons or one per line
Mean, median and mode
Mean (arithmetic average)
Mean = sum of values ÷ number of valuesMedian
Middle value when sorted; for an even count, the mean of the two middle valuesMode
The value that appears most often (there can be more than one, or none)Standard deviation
σ = √(Σ(x − mean)² ÷ n) · s = √(Σ(x − mean)² ÷ (n − 1))σ is the population standard deviation; s is the sample standard deviation, used when your numbers are a sample of a bigger group.
Worked example: 12, 15, 18, 15, 22, 30, 15, 19
- Sum = 146; count = 8; mean = 146 ÷ 8 = 18.25
- Sorted: 12, 15, 15, 15, 18, 19, 22, 30 → median = (15 + 18) ÷ 2 = 16.5
- Mode = 15 (appears 3 times); range = 30 − 12 = 18
Which average should I use?
- Mean for evenly spread data such as test scores or daily temperatures.
- Median when a few extreme values would distort the mean, such as house prices or salaries.
- Mode for the most common choice, such as shoe sizes or survey answers.
- Weighted average when values count differently; use the Grade Calculator.
Frequently asked questions
How do I calculate an average?
Add all the numbers and divide by how many there are. The average of 4, 8 and 9 is 21 ÷ 3 = 7.
What is the difference between mean and median?
The mean uses every value’s size; the median is just the middle value. With 10, 12 and 200, the mean is 74 but the median is 12.
Can I paste numbers from Excel?
Yes. Copy a column or row and paste it in; tabs and new lines are treated as separators.
Related calculators
Grade CalculatorWeighted averages
Percentage CalculatorChanges and shares
Ratio CalculatorCompare values
Non-numeric entries are ignored.