Percent to letter
Type 86 and read the letter, the grade points, and the full percentage band that letter covers on the scale you picked.
Scale rules that change your letter
The lookup is simple. These five policies decide which table the letter grade calculator should be reading in the first place.
Cutoffs are set by policy, not by math
South Carolina moved every district to one 10-point scale in 2016; a 90 that was a B in one county became an A statewide overnight. Nothing about the student changed — only the table did. Check your handbook before trusting any default.
Rounding happens before the lookup
An 89.5 becomes an A- only if your school rounds to whole percentages first. Some gradebooks round, some truncate, and the two disagree on every half point. This page rounds to one decimal and converts.
Plus and minus are optional
Many high schools record straight letters with no pluses at all. If your report card has never shown a B+, use the 10-point scale here — the bands are wider and the grade points are whole numbers.
College scales carry two decimals
A- is 3.67 on most university transcripts, not 3.7, and there is usually no A+ above 4.0. The college option here follows the published University of Florida values.
A syllabus can override everything
Individual instructors set their own cutoffs, and an A starting at 94 is common. Enter those numbers under Custom and every mode on this page follows them.
Standard US letter grade scale
| Letter | Minimum | GPA |
|---|---|---|
| A+ | 97% | 4.0 |
| A | 93% | 4.0 |
| A- | 90% | 3.7 |
| B+ | 87% | 3.3 |
| B | 83% | 3.0 |
| B- | 80% | 2.7 |
| C+ | 77% | 2.3 |
| C | 73% | 2.0 |
| C- | 70% | 1.7 |
| D+ | 67% | 1.3 |
| D | 63% | 1.0 |
| D- | 60% | 0.7 |
| F | 0% | 0.0 |
The default table above. District cutoffs, instructor syllabi, and rounding policies all win over any default shown here.
How this letter grade calculator works
Pick a scale, pick a direction, read the answer.
- 1
Choose your scale
Standard plus/minus, a 10-point scale with no pluses, the college convention with .67 grade points, or custom cutoffs from your syllabus.
- 2
Enter what you know
A percentage, a letter, or a list of letters. Each mode uses the same scale, so answers stay consistent across all three.
- 3
Read the band, not just the letter
The strip shows where you sit and how much room is left before the next cutoff — often the difference between rounding up and not.
What this letter grade calculator actually does
Converting a grade is a lookup, not arithmetic: the letter grade calculator finds the highest cutoff your percentage clears and returns that letter. An 86 clears 83 but not 87, so on the standard plus/minus scale it is a B — while the same 86 is a B on a 10-point scale too, but for a completely different reason, because that scale runs B from 80 straight through 89.
“The floor for a 'C' is 70; 'B' is 80; and 'A' is 90.”
Show the formula and a worked example
Letter = highest cutoff your percentage clearsGrade points come from the same row. Averaging letters means averaging those points, then looking the average back up.
The grade points matter more than the letter once a transcript is involved. Most universities carry two decimals, so an A- is 3.67 rather than 3.7, and four years of that gap is visible on a GPA. This page uses the University of Florida's published values for the college scale and whole-tenth values for the standard one, and shows you which is in play.
Run backwards, the letter grade calculator answers the question students actually ask: what does a B+ require? On the standard scale it starts at 87 and stops at 86.9, a band four points wide. Knowing the width tells you whether one more assignment can move the letter at all.
Conversion in three directions
Letter to percent
Pick a letter and get its range back. A B on one scale spans four points; on another it spans ten.
Average several letters
Enter A, B+, C and the letter grade calculator averages the grade points, then maps the result back to a letter.
Nothing stored anywhere
Grades stay in your browser. No account, no upload, nothing for anyone else to see.
Who this is for
Anyone who has to turn a number into a letter, or back again.
High school
Know the band you are in
A 79 and an 80 are one point apart and a full letter apart. The letter grade calculator shows where you sit inside the band, which tells you whether the next quiz can still move the letter this term.
Letter grade calculator questions, answered
What letter grade is a 70?
A 70 is a C- on the standard plus/minus scale and a straight C on a 10-point scale, where C runs from 70 to 79. Same number, same passing status, different label — which is why the scale matters.
Is an 86 a B or a B+?
An 86 is a B. The plus band starts at 87, so an 86 sits one point below it. On a 10-point scale there is no B+ at all and an 86 is simply a B.
How do I convert a percentage to a letter grade?
Find the highest cutoff your percentage reaches and take that letter. Enter the number above and the letter grade calculator does the lookup on whichever scale you have selected.
What is a 10-point grading scale?
Ten percentage points per letter: A is 90 to 100, B is 80 to 89, C is 70 to 79, D is 60 to 69, and F is anything below. South Carolina adopted it statewide in 2016.
Is an A- 3.7 or 3.67?
Both are in use. High schools commonly publish 3.7; most universities carry two decimals and record 3.67. Pick the matching scale above so the grade points match your transcript.
How do I average letter grades?
Convert each letter to grade points, average those numbers, then look the average back up. Switch this letter grade calculator to average mode and type the letters separated by commas.
Does an A+ count as more than 4.0?
Rarely. On an unweighted scale an A+ is still 4.0, and many colleges do not record an A+ at all. Weighted honors and AP courses are what push a GPA above 4.0, not the plus.
What percentage is a passing grade?
A D at 60 is the usual floor for credit, though many programs require a C or better for a course to count toward a major or transfer.
Can I use my teacher's cutoffs instead?
Yes. Choose Custom, enter the four thresholds from your syllabus, and every mode in the letter grade calculator uses your numbers instead of the defaults.
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