Average Calculator

Add up all the numbers, then divide by how many numbers there are. The average of 4, 8, 6, 5, 3, 9, 7 is (4+8+6+5+3+9+7) ÷ 7 = 42 ÷ 7 = 6.

The mean is the sum divided by the count (the typical "average"). The median is the middle value when the numbers are sorted (or the average of the two middle values if there's an even count). The mode is the value that appears most often — there can be no mode, one mode, or multiple modes (if several values tie for most frequent).

Median is less affected by extreme outliers. For example, average household income is often reported as a median rather than a mean, because a few very high incomes can pull the mean far above what's typical, while the median better reflects the middle of the distribution.

Then there's no mode — mode only applies when at least one value repeats. This calculator will show "no mode" in that case rather than incorrectly listing every number.

Standard deviation measures how spread out your numbers are from the mean. A low standard deviation means values cluster tightly around the average; a high one means they're spread widely. This calculator uses the sample standard deviation (dividing by n−1), the standard choice when your numbers are a sample rather than an entire population.