The Average Calculator finds the average (mean) of any set of numbers. Paste or type your numbers separated by commas, spaces, or new lines, and it instantly shows the average along with the sum, count, median, minimum, maximum, range, and standard deviation.
It is useful for schoolwork, exam marks, budgets, sports scores, and any quick data analysis. Everything is calculated in your browser and nothing is uploaded or stored.
How to calculate an average
- Type or paste your numbers, separated by commas, spaces, or new lines.
- The average (mean) appears at the top instantly.
- Scroll down for the sum, count, median, min, max, range, and standard deviation.
- Click Clear to start over.
Mean vs median
The mean is the sum of all values divided by how many there are — the everyday “average”. The median is the middle value when the numbers are sorted. The median is often more representative when a few very large or very small values would otherwise skew the mean.
What the other statistics mean
- Sum — all the numbers added together.
- Count — how many numbers you entered.
- Range — the difference between the largest and smallest value.
- Standard deviation — how spread out the numbers are from the mean (sample standard deviation, using n − 1).
Frequently Asked Questions
How do I calculate the average of numbers?
Add all the numbers together and divide by how many there are. This calculator does it automatically — just paste your numbers and the mean appears instantly.
What separators can I use between numbers?
You can separate your numbers with commas, spaces, or new lines — or a mix of them. Non-numeric text is ignored.
What is the difference between mean and median?
The mean is the sum divided by the count (the usual average). The median is the middle value when the numbers are sorted, which is less affected by extreme values.
Which standard deviation does it use?
It uses the sample standard deviation (dividing by n − 1), which is the most common choice when your numbers are a sample rather than an entire population.
Is there a limit to how many numbers I can enter?
There is no fixed limit for normal use — you can paste long lists and it calculates instantly in your browser.