Average Calculator
Mean, median, mode, range & sum of a list.
100% private — runs in your browser, nothing is uploaded.
Mean (average)
25
Median
20
Mode
20
Count
5
Sum
125
Min / Max
10 / 45
Range
35
Everything is calculated locally in your browser — your data never leaves your device.
How to use the Average Calculator
- 1Paste your numbers
Separate them with commas, spaces or new lines.
- 2Read the mean
The average appears instantly at the top.
- 3Compare median and mode
See how the middle and most-frequent values differ.
- 4Check sum, min, max and range
All supporting statistics update live.
Examples
| Input | Output |
|---|---|
10, 20, 20, 30, 45 | mean 25 · median 20 · mode 20 |
1 2 3 4 | mean 2.5 · median 2.5 · mode none |
Mean, median and mode in one paste
This average calculator takes any list of numbers — typed, or pasted straight from a spreadsheet — and instantly reports the mean, median, mode, sum, count, minimum, maximum and range. No formulas to remember and no setup: the results update live as you edit the list.
Why three kinds of “average”?
Mean, median and mode answer different questions. The mean spreads the total evenly; the median finds the typical middle value and shrugs off outliers; the mode spots the most common value. Grade averages usually want the mean, income statistics are more honest as medians, and survey answers often call for the mode — seeing all three together stops you from reaching for the wrong one.
Fast, forgiving input
Separate values with commas, spaces, semicolons or new lines — the parser accepts them all and skips anything that isn't a number, so copied spreadsheet columns just work. For spread and variability, continue to the standard deviation calculator, or grade work with the grade calculator.
Frequently Asked Questions
How do you calculate the average (mean)?
Add all the numbers together and divide by how many there are. For 10, 20 and 30 the mean is (10+20+30) ÷ 3 = 20. This tool computes it instantly for any list you paste.
What is the difference between mean and median?
The mean is the sum divided by the count; the median is the middle value when the list is sorted. The median resists outliers — one billionaire in a room changes the mean income drastically but barely moves the median.
What is the mode?
The value that appears most often. A list can have one mode, several modes (if values tie) or none at all when every value appears exactly once — the tool reports all cases.
How is the median found for an even count?
With an even number of values there's no single middle, so the median is the mean of the two middle values. For 1, 2, 3, 4 the median is (2+3) ÷ 2 = 2.5.
What separators can I use when pasting numbers?
Commas, semicolons, spaces, tabs or new lines — mix them freely. Anything that isn't a valid number is simply ignored, so you can paste straight from a spreadsheet column.
Is my data uploaded anywhere?
No. All statistics are computed locally in your browser and nothing is stored.