Weighted Average Calculator | Grades & Portfolio

Calculate weighted averages for grades, portfolio returns, surveys, and any dataset

Enter rows directly, use prebuilt templates, or paste bulk CSV/TSV data...

When Should You Use This Calculator?

Calculating weighted averages quickly with direct row entry
Applying template presets for grades, portfolio returns, and surveys
Parsing bulk rows from CSV/TSV clipboard exports
Comparing weighted means across scenario datasets with consistent weighting logic
Tracking statistical calculations with persistent history

How to Use This Calculator

Choose mode: Simple, Templates, or Bulk.
Enter each value alongside its weight, one row at a time.
Pick a template for common cases like GPA or portfolio returns.
In Bulk mode, paste CSV or TSV data to import many rows at once.
Review the weighted average and how much each row contributes to it.

Key Features:

Three modes: Simple, Templates, and Bulk Paste
Weighted mean calculation with customizable weights
Template presets for grades, portfolios, and survey workflows
Contribution breakdown showing item impact
CSV/TSV bulk paste parser with row-skip feedback

Formula

Weighted Mean = Σ(value × weight) ÷ Σ(weight)

Each value is multiplied by its weight before summing.
A simple average is the special case where all weights are equal.
The contribution breakdown shows how much each row moves the result.

Frequently Asked Questions

When should I use weighted mean?

Use weighted mean when some values contribute more to the final result than others—like grades (credits matter) or investment portfolios (position size matters). A simple average treats all values equally; weighted average respects their relative importance.

How is weighted average different from simple average?

A simple average sums all values and divides by count. A weighted average multiplies each value by its weight, sums the results, then divides by the total weight. Example: a 3-credit A and a 1-credit B gives a weighted average of 3.75, not 3.5.

How do I calculate a weighted GPA using this calculator?

Enter each course grade as a value and its credit hours as the weight. For example, value=4.0 (A), weight=3 credits. Add all courses and the calculator computes your GPA-style weighted average automatically.

What is the formula for weighted mean?

Weighted mean = Σ(value × weight) ÷ Σ(weight). Multiply each value by its weight, add those products together, then divide by the sum of all the weights. For values 80, 90, and 70 with weights 2, 3, and 1, the weighted mean is (160 + 270 + 70) ÷ 6 = 83.3. The calculator shows each row’s contribution so you can see how the weights drive the result.

Can I export my Weighted Mean Calculator calculations?

Yes. In guest mode you can export your calculations to JSON. Signing in adds PDF and CSV export. Click the export button to download your results — useful for record-keeping, sharing, or importing into other tools.

Does this calculator save my history?

Yes. Your calculation history is saved automatically. As a guest you can keep up to 50 calculations per workspace on your device. Sign in for free to keep up to 100 per workspace and access them from any device.

Is this calculator free to use?

Yes. The Weighted Mean Calculator is free to use with no sign-up required. A free account adds more calculation history, multiple workspaces, and access to your saved data from any device.

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