Grading Scale: Percent to Letter Grade
Enter a percentage to view its letter grade on the plus-minus scale, the 10-point scale and the 7-point scale.
Compare grading scales side by side
10-point grading scale
| Letter | Percent |
|---|---|
| A | 90–100 |
| B | 80–89 |
| C | 70–79 |
| D | 60–69 |
| F | below 60 |
The plus-minus grading scale
| Letter | Percent |
|---|---|
| A+ | 97–100 |
| A | 93–96 |
| A− | 90–92 |
| B+ | 87–89 |
| B | 83–86 |
| B− | 80–82 |
| C+ | 77–79 |
| C | 73–76 |
| C− | 70–72 |
| D+ | 67–69 |
| D | 63–66 |
| D− | 60–62 |
| F | below 60 |
7-point grading scale
| Letter | Percent |
|---|---|
| A | 93–100 |
| B | 85–92 |
| C | 77–84 |
| D | 70–76 |
| F | below 70 |
From 60 to 100, you can find 41 whole-number percentages. Under the 7-point scale, 25 of them earn a letter that sits below what the 10-point scale awards: the bands 90–92, 80–84, 70–76 and 60–69.
The 10-point and plus-minus scales use bands from Academic grading in the United States, Wikipedia. The source reports that this 10-point scale is the most common among US public high schools. The 7-point bands follow North Carolina State Board of Education policy GCS-L-004 (2009, archived).
The process for changing a percent into a letter
Your letter grade is based on the exact percent. Rounding it for display never moves the grade up. Under the plus-minus scale, 89.5% stays a B+, while the 10-point scale keeps it at a B.
When your school rounds up, subtract half a point from that letter's lowest score (its cut-off). An A− beginning at 89.5 shows how.
Make your own grading scale
Begin with either the 10-point or plus-minus scale, and change the lowest score for any letter. Load your scale in the grader afterward.