Average Calculators

An average is one number standing in for many, and the trap is always the same: which number, and averaged over what. Averaging the speeds you drove at is not the same as your average speed for the trip, and the mean of a data set can sit nowhere near its middle once one outlier is in play. The calculators in this category work those distinctions out for you and show the arithmetic while they do it — totals summed before dividing, units converted before comparing, each step written out so you can follow it or check your own. Enter your numbers and read off the result, or read the worked examples underneath to see why the method is what it is.