Average Calculator
Paste any list of numbers — test scores, monthly bills, race times, sales figures — and get the average instantly, along with the sum and how many numbers you entered. Values can be separated by commas, spaces or new lines, in any mix.
The average (strictly, the arithmetic mean) is the single most useful summary of a list: one number that represents the typical value. It also shows the sum, because half the time the follow-up question is 'so what was the total?'
How to use
- Paste or type your numbers into the box — commas, spaces and line breaks all work.
- The average, sum and count update as you type.
- Fix any typos in place; the result recalculates on every keystroke.
Frequently asked questions
How do I calculate the average?
Add all the numbers together, then divide by how many there are. The average of 4, 8 and 12 is (4 + 8 + 12) ÷ 3 = 8. This calculator does the arithmetic and tolerates messy formatting.
What is the difference between mean, median and mode?
The mean is the sum divided by the count (what this tool computes); the median is the middle value when sorted; the mode is the most frequent value. Mean is best for well-behaved data; median resists outliers like one huge salary skewing an average.
Does it handle negative numbers and decimals?
Yes — any numeric values work: negatives, decimals, even scientific notation like 1.5e3. Non-numeric text between numbers is ignored.
Is my data uploaded?
No — the calculation runs entirely in your browser with JavaScript. Nothing is sent or stored anywhere.