To calculate the average (mean) of a set of numbers, add all the numbers together and then divide by the total count of numbers. For example, the average of 2, 4, and 6 is (2+4+6)/3 = 4.

Mean is the average value. Median is the middle number when the set is ordered from smallest to largest. Mode is the number that appears most frequently in the set.

Yes, this calculator fully supports negative numbers and decimal values.