Enter your dataset as comma-separated or space-separated numbers into the Data Set field, and this Mean Calculator computes the arithmetic mean (average) along with supporting stats — total count, sum, smallest number, largest number, and range. Paste values directly from a spreadsheet or type them in manually.
Mean (Average)
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Total Numbers
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Sum
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Smallest Number
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Largest Number
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Range
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The mean, also called the arithmetic mean or average, is the central value of a dataset. It is calculated by adding up all the numbers in the set and dividing by how many numbers there are. The mean represents the most typical or representative value in a dataset.
The mean formula is: Mean = Sum of all values ÷ Count of values. For example, if your data set is 5, 10, 15, the sum is 30 and the count is 3, so the mean is 30 ÷ 3 = 10. This is true for both population mean and sample mean, though statistical notation may differ slightly.
In everyday usage and basic statistics, yes — average and mean refer to the same calculation: sum divided by count. Technically, 'average' can sometimes refer to other measures like median or mode, but the arithmetic mean is by far the most common interpretation. This calculator computes the arithmetic mean.
Type or paste your numbers into the Data Set field, separated by commas or spaces. For example: 5, 10, 15, 20 or 5 10 15 20. You can also copy and paste columns of data directly from a spreadsheet — just separate values with commas or line breaks.
The range is the difference between the largest and smallest values in a dataset. It measures the spread or variability of your data. For example, if your highest value is 22 and your lowest is 9, the range is 22 − 9 = 13.
All three are measures of central tendency. The mean is the arithmetic average of all values. The median is the middle value when data is sorted in order. The mode is the value that appears most frequently. For symmetric distributions they are similar, but for skewed data they can differ significantly.
Yes, this calculator accepts both whole numbers and decimal values. Simply enter your decimal numbers separated by commas or spaces, such as 3.5, 7.2, 10.8, and the calculator will compute the exact arithmetic mean to four decimal places.
Outliers are values that are significantly higher or lower than the rest of the dataset. Because the mean uses every value in its calculation, outliers can pull the mean up or down considerably. If your data has extreme outliers, the median may be a more representative measure of central tendency.