Percentage to Letter Grade Converter
Enter a percentage score to get the letter grade and GPA equivalent. Or pick a letter grade to see its percentage range.
Last updated July 2026
Grading scale
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Percentage → Letter Grade
Scale used: A 90+ · B 80–89 · C 70–79 · D 60–69 · F below 60
Grading scales vary by school — check your syllabus, and adjust the scale above if yours differs.
Letter Grade → Percentage Range
Turn any percentage into a letter grade
You just got a quiz back marked 43 out of 50, or your gradebook shows an 84% for the semester, and you want to know what that actually means on your report card. That is exactly what this tool does: type in a percentage and it returns the matching letter grade plus the GPA point value that grade carries on the 4.0 scale. Flip it around and pick a letter to see the full percentage band it covers.
It is built for US high-school and college students who grade on the common 10-point system, but teachers spot-checking a stack of papers and parents decoding a progress report use it the same way. Everything runs in your browser the instant you type — nothing is stored, and you can switch the active grading scale at the top of the tool if your school uses different cutoffs.
Percentage to Letter Grade Chart
The table below shows the standard US 10-point grading scale used by the majority of American high schools and colleges. Each letter grade covers a 10-percentage-point band, mapping to a GPA value on the 4.0 scale.
| Letter Grade | Percentage Range | GPA (4.0 scale) | Description |
|---|---|---|---|
| A | 90–100% | 4.0 | Excellent |
| B | 80–89% | 3.0 | Above average |
| C | 70–79% | 2.0 | Average |
| D | 60–69% | 1.0 | Below average |
| F | Below 60% | 0.0 | Failing |
Note: some institutions use plus/minus grading with narrower bands (e.g. A- = 90–92%). Check your course syllabus for exact cutoffs.
How the Conversion Works
The standard US grading scale divides the 0–100% range into five letter-grade bands of 10 percentage points each. To convert your percentage:
- If your score is 90% or above, you have an A (4.0 GPA).
- If your score is 80–89%, you have a B (3.0 GPA).
- If your score is 70–79%, you have a C (2.0 GPA).
- If your score is 60–69%, you have a D (1.0 GPA).
- If your score is below 60%, it is an F (0.0 GPA).
See also: GPA Scale Reference for the full plus/minus scale, the GPA to Letter Grade Converter for the reverse lookup, and the What Letter Grade is N% hub for instant per-percentage lookups from 50% to 100%.
Worked Examples
A history midterm scored 87%
An 87 falls inside the 80–89 band, so it is a B worth 3.0 grade points. Notice that 87 is comfortably into B territory — you would need three more points to reach the 90 cutoff for an A, and dropping to 79 would push you down to a C. The letter only changes when you cross a full 10-point boundary.
A chemistry lab report scored 72.5%
The decimal does not create a special case. 72.5% sits in the 70–79 range, so it is a flat C (2.0 GPA). A common misread is to assume that "over 72" rounds toward a B — it does not. Only reaching a genuine 80 moves the letter up. On the flip side, a 69.9% is still a D, not a C, for the same reason.
A final exam scored 89.6%
This is the boundary case students argue about most. On a strict 10-point scale, 89.6% is a B, because the A threshold is a hard 90.0. Whether your instructor rounds 89.6 up to a 90 (an A) is entirely their call and varies by course — the math itself does not round for you. If you are one or two tenths of a point away from a higher grade, it is worth asking how your teacher handles rounding before assuming the better letter.
Tips & Common Mistakes
- Do not assume rounding. An 89.4% is a B and a 79.8% is a C unless your syllabus explicitly says grades are rounded to the nearest whole number. Never bank on a round-up you have not confirmed.
- Check whether your school uses plus/minus. The basic five-letter scale here treats everything from 90 to 100 as a plain A. If your course reports A-, B+, and so on, the bands are narrower — an A- is often 90–92% — so use the full GPA scale reference for those cutoffs.
- 90 is not universal. Most schools set the A line at 90%, but a fair number use 93% (leaving 90–92% as an A-), and curved classes can shift the boundary either way. Your syllabus is the final word.
- One assignment is not your course grade. Converting a single 87% quiz tells you that quiz's letter — not your overall standing. To combine weighted categories into an end-of-term grade, use a semester grade calculator instead.
Frequently Asked Questions
How do I convert a percentage to a letter grade?
Use the standard 10-point US grading scale: 90–100% = A (4.0 GPA), 80–89% = B (3.0), 70–79% = C (2.0), 60–69% = D (1.0), below 60% = F (0.0). Enter your percentage above and the calculator returns the letter grade and GPA equivalent instantly.
What percentage is an A, B, C, D, or F?
On the standard US 10-point scale: A is 90–100%, B is 80–89%, C is 70–79%, D is 60–69%, and F is anything below 60%. Some schools use a 7-point scale or add plus/minus grades with narrower bands — check your school's syllabus for the exact cutoffs used in your course.
What GPA does my percentage correspond to?
Under the standard 4.0 scale: A (90–100%) = 4.0, B (80–89%) = 3.0, C (70–79%) = 2.0, D (60–69%) = 1.0, F (below 60%) = 0.0. With plus/minus grading the bands narrow — for example A- is typically 90–92% and maps to 3.7 GPA.
Is a 90% always an A?
At most US schools, yes — 90% is the standard cutoff for an A. However, some instructors set the cutoff at 93% (leaving 90–92% as A-), and others curve the class so cutoffs shift. Always check the grading policy in your course syllabus.
Can I convert a letter grade back to a percentage?
Yes — use the reverse lookup in this tool. Select a letter grade and the tool shows the corresponding percentage range and 4.0 GPA value. Note that a letter grade maps to a range of percentages (e.g. B maps to 80–89%), not a single exact value.