Average formula
Average = Sum of values ÷ Number of valuesMarks 72, 85, 90, 66, 85, 78 → sum 476 ÷ 6 = 79.33.
Weighted average
When items count differently (like credits), multiply each value by its weight, add up, and divide by the total weight. For grades with credits use the CGPA calculator.
Need median, mode and standard deviation too? Use the mean, median, mode calculator.