weighted average calculator
Weighted Average Calculator for Grades and Scores
Not all inputs should count equally. This guide shows weighted-average calculation for realistic scoring.
How to calculate using Weighted Average Calculator
- Enter values list and corresponding weights list in the same order.
- Multiply each value by its weight and sum all products.
- Divide weighted sum by total weight.
Weighted Average Calculator formula
- Weighted mean = sum(value x weight) / sum(weight).
- If weights are percentages, convert correctly when needed.
- Equal weights reduce to simple arithmetic mean.
Worked example
- Values: 80, 90, 75 and weights: 0.3, 0.4, 0.3.
- Weighted sum = 82.5.
- Total weight = 1.0, so weighted average = 82.5.
Accuracy and interpretation notes
- Values and weights must have identical count.
- Check for accidental weight-entry mismatch before finalizing.
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