When should I use a weighted average?

Use weighted average when different values have different levels of importance or contribution. Examples: calculating GPA with different credit-hour courses, portfolio average price when buying at different prices and quantities.

Does it matter what units I use for weights?

No - the calculator normalizes weights automatically. Whether you enter percentages (20, 30, 50), decimals (0.2, 0.3, 0.5), or arbitrary numbers (2, 3, 5), the result is the same.

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Weighted Average Calculator

Live

LabelValueWeight

30.0%

40.0%

30.0%

Total weight: 100.00

Weighted Average

82.5000

Simple Average

83.3333

Total Weight

100.00

Weighted Sum

8250.0000

Item Breakdown

Item 1

Value: 90Weight: 30+27.00

Item 2

Value: 75Weight: 40+30.00

Item 3

Value: 85Weight: 30+25.50

Use Cases

GPA calculation · Exam score weighting · Stock portfolio price · Survey result weighting · Financial performance metrics

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Calculate weighted average for up to 20 value/weight pairs with auto-normalization. Shows weighted vs simple average comparison. Useful for GPA, stock average cost, and surveys.

How to Use

1Click Add Item to add each value and its weight
2Weights can be in any unit - the calculator normalizes them automatically
3Enter up to 20 items - remove any with the trash icon
4Click Calculate to see weighted average, simple average, and comparison
5Copy the result with the copy button

Features

Up to 20 value/weight pairs
Auto-normalization of weights (any unit)
Weighted average vs simple average comparison
Color highlight when weighted > simple average
Dynamic add/remove rows
Copy result button
100% browser-based

Weighted Average Calculator

Item Breakdown

How to Use

Features

Frequently Asked Questions

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