What the Average Calculator does
The average is the first number most people look for in a set of data: the average grade in a class, the average price of a product or the average time for a task. This average calculator gives you the mean together with the median and mode, so you see not only the typical value but also how the numbers are spread.
Just paste a list of numbers from a spreadsheet, a document or a website. Commas, spaces, tabs and line breaks all work as separators. If your numbers use a decimal comma, such as 2,5, separate them with semicolons or put each one on its own line.
Besides the mean, median and mode, the calculator shows the count, sum, minimum, maximum, range and both the sample and the population standard deviation. All calculations run in your browser and update instantly as you type.
When to use it
Grades and test scores
Find the average grade, the middle score and the spread of results in a class.
Prices and budgets
Calculate the average price of products, monthly expenses or quotes from different suppliers.
Science and lab work
Get the mean and standard deviation of repeated measurements in one step.
Surveys and sports
Summarise ratings, response times, lap times or scores quickly.
Tips for the best results
- If the mean and median are far apart, your data is skewed or contains an outlier – check it before reporting the mean.
- Copy a column straight from Excel or Google Sheets: each cell becomes one line and is read correctly.
- For a weighted average, such as grades with different credit points, multiply each value by its weight first and divide by the sum of the weights.
- Round the results only at the end; rounding each number first can change the average noticeably.
How the Average Calculator works
The mean is the sum of all numbers divided by how many there are. The median is the middle value after sorting; with an even count, it is the average of the two middle values.
The mode is the value that appears most often. The range is the maximum minus the minimum.
The standard deviation measures how far the numbers typically are from the mean. It is the square root of the average squared distance from the mean, dividing by n for the population and by n − 1 for a sample.