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Enter each value
Add every grade, score, or measurement with its matching weight.
Free Weighted Average Calculator
A weighted average combines values while giving each one a different level of influence. Enter grades, scores, or any data set to see the normalized result, formula, and every calculation step.
Classroom data support
Turn weighted scores into differentiated instruction
Use the result to review patterns, then bring your IEP goals and accommodations into SPED Lesson Planner for a teacher-reviewed lesson draft.
Values and weights
Build your weighted data set
Weighted average result
Weights total exactly 100%.
Total weight
100 %
Weighted products
8,840
Formula
Weighted average = Σ(value × weight) ÷ Σ(weight)
8,840 ÷ 100 = 88.4
Step-by-step work
- 1. 84 × 20 = 1,680
- 2. 92 × 30 = 2,760
- 3. 88 × 50 = 4,400
- Add the products: 8,840. Add the weights: 100.
- Divide the products total by the weight total: 88.4.
How to Calculate a Weighted Average
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Multiply value by weight
Find each weighted product so larger weights have more influence.
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Divide the totals
Add the products, add the weights, and divide the first total by the second.
Weighted Average Calculator FAQ
What is a weighted average?
A weighted average gives some values more influence than others. Multiply each value by its weight, add the products, then divide by the total weight.
What is the weighted average formula?
The formula is the sum of each value times its weight divided by the sum of all weights: Σ(value × weight) ÷ Σ(weight).
Do percentage weights have to total 100%?
No. If percentage weights do not total 100%, this calculator normalizes them by dividing the weighted products by the entered weight total.
How do I calculate a weighted grade?
Enter each assignment or category grade as a value and its share of the final grade as the weight. The result is the current weighted grade across those categories.
Can weights be points instead of percentages?
Yes. Point weights work as relative importance values. A weight of 4 influences the result twice as much as a weight of 2.