Rubric Score Calculator
Turns a marked rubric into one score. Enter each criterion as "<name>: <earned>/<possible>", separated by commas, and add "* <weight>" where a criterion should count for more than the others.
Turns a marked rubric into one score. Enter each criterion as
"
Each criterion is first converted to a percentage of its own possible points, and those percentages are then averaged by weight. A criterion marked out of 4 and one marked out of 10 therefore count equally unless you say otherwise.
Weights do not have to add up to 1. "2, 1, 1" means the same as "0.5, 0.25, 0.25".
Use cases
- Turning a marked essay rubric into a single percentage
- Checking how much one weak criterion moves a final grade
Examples
Three weighted criteria
Clarity: 3/4 * 0.25, Evidence: 4/4 * 0.5, Style: 2/4 * 0.25
{"percent_score": 81.25, "letter_grade": "B", "total_weight": 1.0, "criteria": [{"name": "Clarity", "earned": 3.0, "possible": 4.0, "weight": 0.25, "percent": 75.0}, {"name": "Evidence", "earned": 4.0, "possible": 4.0, "weight": 0.5, "percent": 100.0}, {"name": "Style", "earned": 2.0, "possible": 4.0, "weight": 0.25, "percent": 50.0}]}FAQ
Is my data sent to a server?
Yes — the calculation runs on the server for this tool.
What if I leave the weights off?
Every criterion counts equally. A weight is only needed where one criterion should matter more than another.
Do the weights have to add up to 1?
No. The total is divided by whatever the weights add up to, so "2, 1, 1" and "0.5, 0.25, 0.25" give the same answer.
Why is a criterion out of 4 worth as much as one out of 10?
Because each is converted to a percentage of its own total first. The weight decides how much a criterion counts, not the number of points it happens to be marked out of.
Which grade scale is used?
A at 90, B at 80, C at 70, D at 60, and F below — the same scale as the other grading tools here.