Weighted Mean Calculator · Weighted Average Free Tool 2026
Calculate weighted arithmetic mean where each value has a weight. Perfect for grade calculation, survey analysis, and financial weighted averages.
How it works: Enter values and their corresponding weights. The tool calculates weighted mean = Σ(value×weight) / Σ(weight). Ideal for weighted grades or surveys.
🎯 Why Use a Weighted Mean Calculator?
Weighted mean is used when different values have different importance (weights). Common applications: weighted grades (exams vs homework), survey responses (different respondent weights), financial portfolio returns, and quality control. Our tool allows you to add any number of (value, weight) pairs, then computes the weighted average. It also shows the sum of weighted values and total weight. Perfect for students, teachers, analysts, and researchers.
📘 How to Use
- Enter values and their corresponding weights.
- Click "Add Row" to insert more data points.
- Click "Calculate Weighted Mean" to see the result.
✨ Features
⚙️ Formula
Weighted Mean = Σ (value_i × weight_i) / Σ (weight_i). The tool also displays sum of weighted values and total weight.
❓ FAQ
1. What if weights sum to zero?
Result is undefined. Tool will show error.
2. Can weights be decimals?
Yes, any positive number.