A 2 out of 4 means 50% only if you divide. A rubric level describes the work. It is not a share of questions right. If a 2 means “partly there,” give it a percent that says so. Choose a level-to-percent table, share it before you grade, and a 2 can be a C instead of an F.
GradeCat has no rubric tool yet, so work the math below by hand or in a spreadsheet.
How a rubric score turns into a failing grade
A gradebook works in points or percents, so a rubric score has to become one. The simplest way is to divide by the top level:
| Level | Division | Percent | Letter |
|---|---|---|---|
| 4 | 4 ÷ 4 | 100% | A |
| 3 | 3 ÷ 4 | 75% | C |
| 2 | 2 ÷ 4 | 50% | F |
| 1 | 1 ÷ 4 | 25% | F |
Letters here use the 10-point scale in Florida law for public school grades 6-12. The US has no national grading standard, so yours may differ.
Two things follow. A student at level 3 on everything gets a C. A student at level 2 on everything fails.
The steps are also too wide. Levels sit 25 points apart, while B, C and D are each 10 points wide. One step from 3 to 2 drops a student from a C to an F, skipping the D.
Compare grade points. The same Florida law gives A 4 points, B 3, C 2, D 1 and F 0. There, 2 out of 4 is a C, for scores of 70 to 79.
What each level means in practice
Before you pick numbers, write down what each level means in your class. Here is a made-up set for an essay:
| Level | What it means (example) |
|---|---|
| 4 | Goes beyond what the task asked |
| 3 | Does what the task asked |
| 2 | Does part of what the task asked, with clear gaps |
| 1 | Tries, but misses most of the task |
Now read those next to the percents above. Doing what the task asked earns a 75%. Doing part of it earns a 50%. If that is not what you mean, change the conversion.
Keep missing work out of the rubric. A 1 is for real work that falls short. Work not turned in is a gradebook question, and How to Set Up a Gradebook Students Can Check covers zeros, blanks and excused work.
Ways to convert rubric levels into grades
Here are four ways, and what each does to a 2.
- Divide by the top level. A 2 becomes 50%. This fits a rubric you built as points. The Test Grade Calculator divides too, so 8 out of 16 shows 50%. Use it for tests, not for converting levels.
- Add a floor. Keep equal steps but start higher. With a floor of 50, the percent is 50 + (12.5 × level). A 1 becomes 62.5, a 2 becomes 75, a 3 becomes 87.5, and a 4 stays 100.
- Use a level-to-percent table. You set each percent by hand, so a 2 becomes what you decide. The next section builds one.
- Go straight to a letter. Read levels like grade points: 4 is A, 3 is B, 2 is C, 1 is D. You still need a number if your gradebook wants a percent.
Every option after the first pushes low work up. With a floor of 50, a paper of all 1s gets 62.5, a D. If that is too kind for work that misses most of the task, set the floor lower.
Build a level-to-percent table for your class
This table is an example you can change. We found no official mapping from rubric levels to percents.
| Level | Percent | Letter |
|---|---|---|
| 4 | 95 | A |
| 3 | 85 | B |
| 2 | 75 | C |
| 1 | 65 | D |
We used the middle of each letter’s range on the 10-point scale. To build your own:
- Decide which letter each level deserves.
- Pick a percent inside that letter on your scale. The Check a percent box on the Grading Scale page shows its letter.
- Decide whether a 1 should pass. Here, a paper of all 1s gets a 65, a D.
- Decide whether a top paper can reach 100. Here, it stops at 95. If that bothers you, set the 4 to 100.
- Try the table on a few old papers.
Weighting your criteria
If your rubric has several criteria, they may not matter equally. Give each one a weight, make the weights add up to 100, then add up weight × percent. Equal weights are fine too. Just choose them on purpose.
The Weighted Grade Calculator can do this step. Enter each criterion as a category, with its weight under Weight % and its percent under Grade so far. It does not know your rubric or your table, so convert the levels first.
Worked example: one essay from rubric to final grade
Made-up example. One essay, four criteria, scored with the example table above.
| Criterion | Weight | Level | Percent | Weight × percent |
|---|---|---|---|---|
| Argument | 30% | 3 | 85 | 25.5 |
| Evidence | 30% | 2 | 75 | 22.5 |
| Organization | 20% | 3 | 85 | 17.0 |
| Mechanics | 20% | 4 | 95 | 19.0 |
Add the last column: 25.5 + 22.5 + 17.0 + 19.0 = 84.0. That is a B on the 10-point scale. Enter 84 out of 100 in your gradebook.
Now use plain division on the same levels: (0.30 × 75) + (0.30 × 50) + (0.20 × 75) + (0.20 × 100) = 72.5. That is a C.
The essay and its levels are the same both times. The 11.5-point gap comes only from the conversion, so choose it before you grade and use it on every paper.
What to tell students before you grade
Hand out the rubric with the assignment, along with:
- What each level means
- Your level-to-percent table
- The weight of each criterion
- What happens to missing work
- Whether you round
Then show one worked example. A student who gets the rubric back should be able to reach the grade with a phone calculator. One line can do it: “On this essay, a 3 is 85% and a 2 is 75%, and the weights are on the rubric.”
If other teachers share the course, agree on one table first, so a 2 means the same in every section.
Sources
Tools for this guide
- Grading Scale: See how percents turn into letter grades, and set your own scale.
- Weighted Grade Calculator: Get your grade when homework, quizzes and exams count differently.
- Test Grade Calculator: Turn questions wrong into a score, with a chart you can print.
More guides
- How to Curve Grades Fairly: Methods Compared
- How to Set Up a Gradebook Students Can Check
- Zero, 50% or Missing: How Each Changes a Grade
- Weighted Grades in Excel and Google Sheets
- Standards-Based Report Cards: What a 1 to 4 Means
This guide is general information. Your school's rules come first. Found a mistake? Tell us.