How to use this calculator
Calculate a weighted average for grades, scoring, business metrics, or any values where some entries count more than others.
How the calculation works
- Enter each value with its weight.
- Each value is multiplied by its weight.
- The weighted sum is divided by total weight.
Formula
Weighted average = sum(value x weight) / sum(weights).
Example
Values 80 at weight 40 and 90 at weight 60 produce a weighted average of 86.
Understanding your result
Use the output as a practical starting point, then review it before using it in an important workflow.
Assumptions and limitations
- Weights must be non-negative.
- At least one row needs a positive weight.
Frequently asked questions
Does this require an account?
No. The core tool works without creating a Tool2Do account.
Is my input included in share links or analytics?
No. Tool2Do share actions use the tool page URL and safe metadata, not private values or uploaded files.