Enter a list of numbers to calculate the average, also called the arithmetic mean. You can separate values with commas, spaces, or line breaks. This calculator is useful for grades, test scores, expenses, sales numbers, sports stats, and quick data checks.
What is an average calculator?
An average calculator finds the arithmetic mean of a group of numbers. The average is one of the most common ways to summarize a data set because it gives you a single value that represents the overall level of the numbers you entered.
For example, if your test scores are
85, 92, 78, 90, 95, the calculator adds the scores together and divides by the number of scores. This gives you a quick grade average without doing the math by hand.Average formula
The basic average formula is:
Average = Sum of all values ÷ Number of values
Example:
Sum = 10 + 20 + 30 = 60
Count = 3
Average = 60 ÷ 3 = 20
10, 20, 30Sum = 10 + 20 + 30 = 60
Count = 3
Average = 60 ÷ 3 = 20
How to use this average calculator
Type or paste your numbers into the input box. You can separate numbers with commas, spaces, or line breaks. The calculator supports whole numbers, decimals, negative numbers, and common U.S. number formatting such as
1,200 or $2,500.Common uses
- Grades and test scores: calculate the average score across quizzes, exams, assignments, or classes.
- Budgeting: find your average monthly spending, income, or savings.
- Business data: average daily sales, weekly revenue, customer ratings, or performance metrics.
- Sports stats: calculate average points, running pace, game scores, or training results.
- Data analysis: quickly summarize a list of values before comparing it with the median, minimum, maximum, or range.
Average vs. median
The average is useful, but it can be affected by unusually high or low values. The median is the middle value after the numbers are sorted. When a data set has outliers, such as one very expensive home price or one unusually high salary, the median may better describe the “typical” value.
This calculator shows both the average and the median so you can quickly see whether the data is balanced or whether one value may be pulling the average up or down.
Arithmetic mean vs. weighted average
This page calculates a simple arithmetic mean, where every number has the same importance. If some values should count more than others, such as a final exam worth 40% of a grade, you would need a weighted average instead.
