Letter Grade Calculator
Convert your percentage score to a letter grade instantly.
Standard Grading Scale
This is the plus/minus scale used by most US colleges and by this calculator, with the grade point value each letter carries on the unweighted 4.0 scale.
| Letter Grade | Percentage Range | GPA Points |
|---|---|---|
| A+ | 97% - 100% | 4.0 |
| A | 93% - 96% | 4.0 |
| A- | 90% - 92% | 3.7 |
| B+ | 87% - 89% | 3.3 |
| B | 83% - 86% | 3.0 |
| B- | 80% - 82% | 2.7 |
| C+ | 77% - 79% | 2.3 |
| C | 73% - 76% | 2.0 |
| C- | 70% - 72% | 1.7 |
| D+ | 67% - 69% | 1.3 |
| D | 63% - 66% | 1.0 |
| D- | 60% - 62% | 0.7 |
| F | 0% - 59% | 0.0 |
What letter grade is each percentage?
The same percentage can be a different letter depending on which scale your school uses. These are the three you are most likely to meet.
| Percentage | Plus/minus | 10-point scale | 7-point scale |
|---|---|---|---|
| 95% | A | A | A |
| 90% | A- | A | B |
| 89% | B+ | B | B |
| 85% | B | B | B |
| 80% | B- | B | C |
| 78% | C+ | C | C |
| 75% | C | C | D |
| 72% | C- | C | D |
| 70% | C- | C | D |
| 65% | D | D | F |
| 60% | D- | D | F |
| 55% | F | F | F |
Understanding Letter Grades
Letter grades compress a percentage into a band so that a 93% and a 96% are recorded identically. That compression is why two students with visibly different scores can finish a course with the same grade, and why a single point can matter enormously at a boundary: 89% and 90% are one point apart but sit in different letters, and on a plus/minus scale that is the difference between 3.3 and 3.7 grade points.
Two policies decide what actually lands on your transcript, and neither is visible in the percentage itself:
- Rounding. Some gradebooks round to a whole percent before assigning a letter, so 89.5% becomes 90% and an A-. Others compare the raw value and leave it a B+. This calculator uses the raw value.
- Which scale. A 92% is an A- with plus/minus grading, a plain A on a 10-point scale, and still an A- worth checking on a 7-point scale where the A cutoff is 93%.
If you need the letter for a specific test score rather than a percentage, the test score charts convert any points-out-of-total result directly, and show how many questions you can miss for each grade.
Frequently Asked Questions
On the standard plus/minus scale an A range is 90-100%: an A+ is 97-100%, an A is 93-96%, and an A- is 90-92%. On a plain 10-point scale everything from 90% up is simply an A.
An 89% is a B+ on the plus/minus scale, one point short of the 90% A- cutoff. On a plain 10-point scale it is a B. This is the most commonly disputed boundary, because many teachers round 89.5% up to an A- and many do not.
That depends entirely on your teacher. Some gradebooks round to the nearest whole percent before assigning a letter, which turns 89.5% into 90% and an A-. Others compare the unrounded value, which leaves it a B+. This calculator compares the unrounded percentage, so it never silently promotes a borderline score.
A D (60%) is the minimum passing grade at most schools, but many degree programs require a C (70%) for a course to count toward a major, and some graduate programs require a B (80%).
No. The most common US scale is the 10-point scale, where each letter spans ten percentage points. Some districts and private schools use a stricter 7-point scale where an A starts at 93% and a D starts at 70%. Colleges commonly add plus and minus modifiers. Always check the scale printed on your syllabus.
Plus/minus grading adds + and - modifiers for more precision. An A- (90-92%) is lower than an A (93-96%), and a B+ (87-89%) is higher than a B (83-86%). The modifiers matter for GPA: an A- is 3.7 grade points rather than 4.0.
At most schools, no. An A+ and an A are both worth 4.0 grade points on the standard unweighted scale. A handful of institutions award 4.3 for an A+, and weighted high school scales can push honors or AP courses above 4.0, but that is a school policy rather than a property of the letter.
A 2.0 grade point average corresponds to a C, which is 73-76% on the plus/minus scale or 70-79% on a plain 10-point scale. A 2.0 is normally the minimum required to stay in good academic standing.
Related Calculators
Weights & Final
Average assignment scores with custom weights and see what you need on the final exam
Test Grade
Convert points earned to percentage and letter grade
Grade Average
Calculate the simple average of your grades
GPA
Calculate your GPA from letter grades and credit hours
Grade Curve
Apply different curve methods to your grades