Letter Grade Calculator — Free Online 2026

Grade Calculator

Letter Grade Calculator

Convert any percentage or GPA to a letter grade instantly. Supports standard, plus/minus, and custom grading scales. Batch mode for grading multiple scores at once.

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Letter Grade

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GPA Value

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Percentage

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Standing

Find Your Letter Grade

Input Type

Grading Scale

Your Score

Input Type

Grading Scale

Enter percentages or GPA values separated by commas, spaces, or new lines. Example: 85, 92, 78, 65

Grade Breakdown

0.0 N/A

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Letter Grade

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GPA

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Percentage

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Range

Visual Comparison

Score Position

Grade Scale

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Letter Grade Scale Reference

Letter	Plus/Minus %	Standard %	GPA	Description
A+	97-100	90-100	4.0	Exceptional
A	93-96		4.0	Excellent
A-	90-92		3.7	Very Good
B+	87-89	80-89	3.3	Good Plus
B	83-86		3.0	Good
B-	80-82		2.7	Above Average
C+	77-79	70-79	2.3	Average Plus
C	73-76		2.0	Average
C-	70-72		1.7	Below Average
D+	67-69	60-69	1.3	Poor Plus
D	63-66		1.0	Poor
D-	60-62		0.7	Barely Passing
F	0-59	0-59	0.0	Fail

How to Find Your Letter Grade from a Percentage

A letter grade is the alphabetic representation of your academic performance. In the US system, grades range from A (excellent) to F (fail), with each letter corresponding to a specific percentage range and GPA value. Schools assign letter grades because they simplify communication — instead of saying you scored 87.3%, you can say you earned a B+ (GPA 3.3). This calculator converts any percentage or GPA value to its letter grade equivalent using the grading scale your school follows.

Percentage to Letter Grade (Plus/Minus Scale):
97-100% = A+ (4.0) 93-96% = A (4.0) 90-92% = A- (3.7)
87-89% = B+ (3.3) 83-86% = B (3.0) 80-82% = B- (2.7)
77-79% = C+ (2.3) 73-76% = C (2.0) 70-72% = C- (1.7)
67-69% = D+ (1.3) 63-66% = D (1.0) 60-62% = D- (0.7)
Below 60% = F (0.0)

Example: Sarah scored 87% on her midterm.
87% falls in the B+ range (87-89%), so her letter grade is B+ with a GPA value of 3.3.

The formula box above shows the most common US scale, but your school might use slightly different cutoffs. Some institutions start the A range at 94% instead of 93%, or set B- at 78% instead of 80%. Always verify your school’s specific grading policy. If your cutoffs differ from the standard, use the Custom Scale option above to set your own breakpoints. For converting between international grading systems, our grade converter handles US, UK, Australian, Indian, German, and Canadian systems.

Standard vs Plus/Minus Grading

The two most common US grading scales differ in precision. The standard scale uses five broad letters (A = 90-100%, B = 80-89%, C = 70-79%, D = 60-69%, F = below 60%). The plus/minus scale subdivides each letter into three tiers, creating 13 grades from A+ to F. About 65% of US colleges use some form of plus/minus grading because it gives more accurate feedback about student performance.

The choice between scales has real GPA consequences. On the standard scale, a student with 91% and another with 99% both receive an A worth 4.0 GPA points. On the plus/minus scale, the 91% student gets A- (3.7) while the 99% student gets A+ (4.0). Students near the bottom of a letter range benefit from standard grading since they avoid minus grades, while students at the top of a range benefit from plus/minus grading since they earn plus grades. Our GPA calculator shows how different grading scales affect your cumulative GPA across multiple courses.

Converting GPA Values Back to Letter Grades

Sometimes you know your GPA but need the corresponding letter grade — for example, when a scholarship requires a “B+ or higher” and your transcript shows 3.4. The calculator’s GPA input mode handles this reverse lookup by mapping GPA values back through the grading scale. On the plus/minus scale, 3.3 = B+, 3.0 = B, and 2.7 = B-. Values between standard GPA points (like 3.5) are rounded to the nearest letter grade, so 3.5 maps to B+ (3.3) since it falls between B+ and A- (3.7). A common search is what letter grade a 3.75 GPA represents — the answer is between A- (3.7) and A (4.0), so most schools would record that as an A-. On the standard five-letter scale, GPA mapping is simpler: 4.0 = A, 3.0 = B, 2.0 = C, 1.0 = D, 0.0 = F, with values rounded to the nearest whole letter. You can see how your letter grades combine into your overall GPA using our GPA calculator or check grading standards across countries with our grading scale reference.

Using the Batch Mode for Multiple Scores

The batch mode is designed for situations where you need to convert many scores at once. Teachers grading a stack of papers can paste all the scores (separated by commas, spaces, or new lines) and get every letter grade instantly in a table with summary statistics. Students can also use batch mode to enter all their assignment scores from a semester and see the distribution of their letter grades at a glance. For calculating how individual scores combine into an overall class grade, use our grade calculator which handles weighted categories like homework, quizzes, and exams.

Pro Tip: If your professor uses a non-standard scale (like setting an A at 94% instead of 93%), switch to the Custom Scale and edit the cutoffs before running batch conversion. This ensures every score maps to the correct letter grade for your specific class. You can also check individual test results with our test grade calculator to see how many questions you need correct for each letter grade.

Common Mistakes with Letter Grades

Assuming all schools use the same cutoffs: A “B” at one university might start at 80%, while at another it starts at 83%. Always check the specific syllabus for your course before interpreting a percentage as a letter grade.
Confusing GPA impact of plus/minus grades: An A- (3.7) is significantly different from an A (4.0) when calculating cumulative GPA. Over 15 courses, the difference between several A-minus grades and flat A grades can mean the difference between graduating with honors or not.
Forgetting that F has no minus: The grade scale goes D- (0.7) and then F (0.0). There is no F+ or F- in standard US grading. Any score below 60% (or below D- in plus/minus) earns zero GPA points regardless of how close to passing it is.
Not accounting for rounding: Some professors round grades up (89.5% becomes 90% = A-) while others do not (89.5% stays as B+ = 3.3). This single percentage point can change your letter grade. Ask your professor about their rounding policy early in the semester. Check your standing with our percentage to GPA calculator which shows exact mappings for borderline scores.

Common Mistake: Averaging letter grades directly instead of averaging GPA points. If you got an A (4.0) and a C (2.0), the average is not “B” — it is GPA 3.0, which maps to B on the standard scale but B on the plus/minus scale as well. However, if courses have different credit weights, a simple average is wrong. Always use credit-weighted GPA calculations.

Example: Marcus checks his five midterm scores: 92, 85, 78, 95, 71. He enters them in batch mode with the plus/minus scale. The results show: A- (3.7), B (3.0), C+ (2.3), A (4.0), C- (1.7). His average percentage is 84.2%, which maps to B (3.0 GPA). The batch summary confirms his class average and distribution at a glance.

Frequently Asked Questions

What letter grade is 85%?

On the standard US plus/minus scale, 85% is a B (83-86%). On the standard scale without plus/minus, 85% is also a B (80-89%). Some schools use different cutoffs, so always check your institution’s specific grading policy.

What GPA is a B+?

A B+ equals 3.3 on the US 4.0 GPA scale. It corresponds to a percentage range of 87-89% on the standard plus/minus scale. On a 4.3 scale used by some Canadian universities, B+ also equals 3.3.

What letter grade is a 3.75 GPA?

A 3.75 GPA falls between A- (3.7) and A (4.0) on the plus/minus scale. Most schools would round this to an A- since 3.75 is closer to 3.7 than to 4.0. This is equivalent to approximately 91-92% on the standard US scale.

What is the difference between standard and plus/minus grading?

Standard grading uses 5 letters (A, B, C, D, F) with wide ranges like A = 90-100%. Plus/minus grading adds modifiers creating 13 grades: A+, A, A-, B+, B, B-, etc. Plus/minus gives more precise feedback but can lower GPAs since an A- (3.7) is lower than a flat A (4.0).

Can I set custom grade cutoffs?

Yes. Select “Custom Scale” from the grading scale dropdown, then click “Edit Cutoffs” to set your own minimum percentage for each letter grade. This is useful when your school uses non-standard grade boundaries.

How does batch mode work?

Switch to the Batch tab, then enter multiple scores separated by commas, spaces, or new lines. The calculator converts all scores to letter grades at once and displays them in a table. This is useful for teachers grading multiple papers or students checking several assignments.

Is a D a passing grade?

A D (60-69%) is technically passing at most US schools, meaning you earn credit for the course. However, many programs require a C or higher for major courses, and graduate schools typically require a B. A D in a prerequisite course usually means you need to retake it.

What percentage do I need for an A?

On the standard US scale, you need 90% or higher for an A. On the plus/minus scale, an A requires 93-96%, while an A- is 90-92% and an A+ is 97-100%. Some schools set the A cutoff at 93% or 94% instead of 90%.

How do letter grades convert to GPA?

Each letter grade maps to a GPA value: A/A+ = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0. Your overall GPA is the credit-weighted average of all course GPAs.

Why do some schools not use plus/minus grading?

Schools without plus/minus grading argue it reduces stress and GPA anxiety. A student with 90% and one with 99% both get an A (4.0). With plus/minus, the 90% student gets A- (3.7) while the 99% gets A+ (4.0). The debate continues, with about 65% of US colleges using some form of plus/minus.