How to Calculate an Average: Mean, Median and Mode
The mean explained with examples, plus how it differs from the median and mode.
How to calculate the mean
The “average” usually means the arithmetic mean: add up all the numbers, then divide by how many there are. For 4, 8 and 12, that’s (4 + 8 + 12) ÷ 3 = 24 ÷ 3 = 8. An average calculator does this instantly and also shows the sum and count.
Mean vs median vs mode
The mean is the total shared equally; the median is the middle value when the numbers are sorted; the mode is the value that appears most often. They can differ a lot — in incomes or prices, a few very large values pull the mean up, so the median is often a fairer “typical” figure.
When the mean can mislead
Because every value affects it, the mean is sensitive to outliers. One unusually high or low number can shift it noticeably. If your data has extremes, report the median alongside the mean so the picture isn’t skewed.
FAQ
Is “average” the same as “mean”?+
In everyday use, yes — “average” almost always means the arithmetic mean. Median and mode are other kinds of average used in statistics.