Average Calculator
Averages and the rule of three
- Median
- 4
- Count
- 5
- Sum
- 19
- Lowest
- 2
- Highest
- 5
(4 + 5 + 3 + 5 + 2) ÷ 5 = 3.8
Formula: x = b × c ÷ a · Updated Oct 22, 2026
Paste or type numbers separated by spaces, commas or new lines. Add weights (for example credits or coefficients) to get a weighted average.
How to use the Average Calculator
- Type or paste your numbers.
- Optional: the weights in the same order.
- Read the average, median and the other statistics.
How to calculate an average
Add the numbers and divide by how many there are: (2 + 4 + 9) ÷ 3 = 5.
Weighted average
Multiply each value by its weight, add them up and divide by the sum of the weights. Grades 5 (weight 2), 3 and 4: (5 × 2 + 3 + 4) ÷ 4 = 4.25.
Mean vs median
The median is the middle value of the sorted list, so one extreme value moves it less: for 1, 2, 3, 4 and 100 the mean is 22 but the median is 3.
Frequently asked questions
How do I calculate a weighted average?
Sum of (value × weight) divided by the sum of the weights.
What is the median of an even list?
The average of the two middle values: the median of 1, 2, 3, 4 is 2.5.
More calculators
Results are rounded for display; the calculation itself uses full precision. Tax and price results are estimates — check the official rate for your case.