Enter a set of numbers into the Average Calculator and get the arithmetic mean, sum, count, median, mode, minimum, and maximum back in one click. Type your values into the Numbers field separated by commas or spaces, and all key statistics calculate automatically. Also try the calculate Median.
Average (Mean)
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Count
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Sum
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Median
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Mode
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Min Value
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Max Value
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Range
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An average (or mean) is a single number that represents a collection of numbers. It is calculated by adding all the values together and dividing by the count of values. For example, the average of 2, 7, and 9 is (2+7+9)/3 = 6.
The four common types of averages are the arithmetic mean (sum divided by count), the median (middle value when sorted), the mode (most frequently occurring value), and the geometric mean (the nth root of the product of n numbers). This calculator focuses on the arithmetic mean, which is what most people refer to as 'the average'.
Averages help summarize a large set of data into a single representative value, making it easier to understand trends, compare groups, and draw conclusions. They are used in everyday contexts like grades, salaries, temperatures, and sports statistics.
The average (mean) is the sum of all values divided by the count, while the median is the middle value when the data is sorted. The median is often a better measure when data has extreme outliers, because those outliers skew the mean but do not affect the median.
Averages can be misleading when a data set contains extreme outliers. For example, if most employees earn $30,000 but one earns $1,000,000, the mean salary will be much higher than what a typical employee earns. In such cases, the median is usually a more representative measure.
A weighted average assigns different levels of importance (weights) to each value. Multiply each value by its weight, sum all those products, then divide by the total sum of weights. For example, if grades of 70, 80, and 90 have weights of 2, 3, and 1, the weighted average is (2×70 + 3×80 + 1×90) / (2+3+1) = 78.33.
Add up all your grades and divide by the number of grades. For example, if you scored 85, 90, 78, and 92, your average grade is (85+90+78+92)/4 = 86.25. If your courses have different credit weights, you would use a weighted average instead.
The mean is the arithmetic average of all values, while the mode is the value that appears most frequently in the data set. A data set can have no mode (all values unique), one mode, or multiple modes. The mode is most useful for categorical data or when you want to know the most common value.