Average Calculator
Calculate mean, median, and mode
Calculator
How to Use
Calculate mean, median, and mode
Enter values
Input your list of numbers
Add weights
Optionally add weights for weighted average
View results
See mean, median, and mode
See statistics
View range, sum, and count
Average Formulas
Mean = Σx / n Median = middle value (or avg of middle two) Mode = most frequent value
Mean is arithmetic average, median is middle when sorted, mode is most common.
Frequently Asked Questions
Mean is the arithmetic average (sum ÷ count). Median is the middle value when sorted. Mode is the most frequent value. For [1,2,2,3,10]: mean=3.6, median=2, mode=2. Median is better when outliers exist.
Multiply each value by its weight, sum results, divide by sum of weights. Values [80, 90, 70] with weights [3, 2, 1]: (80×3 + 90×2 + 70×1) / (3+2+1) = (240+180+70)/6 = 81.67.
Use median when data has outliers or is skewed. Example: incomes of $30K, $40K, $50K, $60K, $1M. Mean = $236K (misleading), Median = $50K (representative). Median is robust to extreme values.
Geometric mean = nth root of the product of n values. Used for growth rates and ratios. If investment returns were 10%, -5%, 15%: geometric mean = ³√(1.1×0.95×1.15) - 1 = 6.3%, not arithmetic 6.67%.