Percentage to Letter Grade Converter
Enter a percentage and instantly see what letter grade it corresponds to. Customize your grading scale or check the full reference chart below.
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| Grade | Range | GPA |
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Enter one percentage per line. Non-numeric lines are skipped.
Why There Is No Single U.S. Grading Scale
Different U.S. institutions use different grading scales. While the 13-grade scale (A+ through F) shown above is common in colleges, it is far from universal. Some schools use:
- A simple 5-letter scale (A B C D F) without plus and minus grades
- Percentage-based systems where 90+ is A, 80+ is B, etc.
- Scales where A+ tops out at 4.0 instead of 4.3
- Weighted scales for honors and AP courses (up to 5.0 or 6.0)
- Entirely different systems like narrative evaluations or pass/fail grades
Always check your school's official grading policy before making important decisions about your coursework. What counts as an "A" varies, and that variation matters.
Letter Grades to 4.0 Grade Points
The conversion below assumes the standard 13-grade scale. Many institutions cap A+ at 4.0 for GPA calculation purposes, even though the percentage scale runs to 100%. Check with your registrar for your school's specific policy.
| Grade | GPA (Standard) | GPA (4.0-Capped) |
|---|---|---|
| A+ | 4.3 | 4.0 |
| A | 4.0 | 4.0 |
| A− | 3.7 | 3.7 |
| B+ | 3.3 | 3.3 |
| B | 3.0 | 3.0 |
| B− | 2.7 | 2.7 |
| C+ | 2.3 | 2.3 |
| C | 2.0 | 2.0 |
| C− | 1.7 | 1.7 |
| D+ | 1.3 | 1.3 |
| D | 1.0 | 1.0 |
| D− | 0.7 | 0.7 |
| F | 0.0 | 0.0 |
Rounding: Is an 89.5 an A−?
Whether 89.5% rounds up to 90% (an A−) or stays at 89% (a B+) depends entirely on your school's rounding policy, not mathematics. Some schools round to the nearest integer; others truncate (always round down). Some don't round at all and evaluate based on the exact score.
Check your syllabus or ask your professor. Many instructors will specify their rounding rule explicitly, and if they don't, it's fair to ask. In exam season, clarifying ambiguous grading rules can make a real difference to your final grade.
Frequently Asked Questions
What percentage is a B+?
On the standard 13-grade scale, a B+ corresponds to 87–89%. However, check your specific school's policy, as some institutions use different ranges.
Does extra credit always raise my grade?
Extra credit can boost your percentage, but whether that translates to a letter-grade increase depends on how close you are to the cutoff. If you're at 89.9% (B+) and earn 0.2% extra credit, you'll hit 90.1% (A−). However, some schools cap A+ at 4.0 GPA even if your percentage exceeds 97%, so check your institution's policy on extra credit grade-point ceilings.
What is GPA and how does it relate to letter grades?
Grade Point Average (GPA) is a numerical summary of your letter grades across all your courses. Each letter grade has a corresponding point value (A = 4.0, B = 3.0, etc.). Your GPA is the average of all those points, weighted by course credit hours. See our percentage to GPA calculator for a more detailed explanation.
Can I calculate what grade I need on the final exam?
Yes, but that's a separate tool. Use our final grade calculator to enter your current grade and target grade, and it will tell you exactly what you need on the final.
What if my school doesn't use letter grades?
Some institutions use pass/fail systems, narrative evaluations, or entirely different grading schemes. This tool assumes the standard U.S. letter-grade scale. If your school uses a different system, you'll need to refer to your school's official grading policy to map percentages to whatever system they use.
Can I modify the grading scale to match my school?
Yes. Select "Custom" in the scale switcher above and adjust the percentage cutoff for each grade. Your custom scale will be saved in your browser, so you won't have to re-enter it on your next visit.
Sources
- Calculator.net — Grade Calculator: The 13-grade scale (A+ through F) with corresponding percentage ranges and GPA points used in this tool.
- Wikipedia — Academic Grading in the United States: Information on the wide variation in grading scales across U.S. institutions, including alternative systems and policies.
Everything stays in your browser — nothing is uploaded. Your custom grading scale is saved to browser storage.