Weighted Average Calculator (with Weights)

This calculator computes the weighted average of several numbers (128 maximum) using weights.

What is a weighted average?

The weighted average is a way of calculating an average that takes into account the relative importance of each number. Each value is multiplied by a weight that reflects its influence in the final calculation. The formula for the weighted average is:

Weighted average = (Σ (value × weight)) / (Σ weights)

Where Σ represents the sum of all the values and weights.

How to use this calculator?

• Enter the numbers in the "Number" fields.
• Enter the corresponding weights in the "Weight" fields. If a number has no specific weight, you can leave the weight at 1.
• The weighted average is calculated automatically and displayed in the "Average" field.
• You can add or remove lines using the "+ 4 lines" and "- 4 lines" buttons.
• Use the "Clear all", "Clear numbers" or "Clear weights" buttons to reset the fields as needed.
• To save your data, click the "Save" button.

Note: Empty fields or zero weights are ignored in the calculation.

Saving and history

You can save your calculations by clicking the Save button. Your data is recorded in the history located below the calculator.

You can export the results in CSV or PDF format.

Who is it useful for?

This calculator is particularly useful for students, teachers, professionals and anyone who needs to calculate weighted averages in various contexts, such as school grades, performance evaluations, or statistical analyses.

Usage examples:

• Calculating a student's grade average taking into account the weights assigned to each subject.
• Evaluating an employee's performance based on different weighted criteria.
• Analyzing statistical data where some values matter more than others.

By using this calculator, you can easily get an accurate weighted average, which helps you make informed decisions based on weighted data.