Weighted Average Calculator
Average values with different weights, like grades or portfolios.
Quick answer
The mean (average) is the sum of the values divided by how many there are. The median is the middle value when sorted, and the mode is the most frequent. The median resists distortion when a few extreme values would skew the mean.
Weighted average
87.55
Unweighted mean
86.3333
Total weight
100
When every value isn't equal
A weighted average multiplies each value by its importance before averaging: exam scores by their syllabus weight, portfolio returns by position size, review stars by vote counts. With weights 30/45/25, the middle score dominates the result.
Weights as percentages or not
Weights needn't sum to 100 — the formula divides by their total, so 30/45/25 and 6/9/5 give identical results. What matters is their ratio. A plain mean is just the special case where every weight equals one.
Frequently asked questions
- How does the Weighted Average Calculator work?
- The mean (average) is the sum of the values divided by how many there are. The median is the middle value when sorted, and the mode is the most frequent. The median resists distortion when a few extreme values would skew the mean.
- Is the Weighted Average Calculator free to use?
- Yes. The Weighted Average Calculator is completely free, runs entirely in your browser, and requires no account or sign-up. Your inputs never leave your device.
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