Convert a percentage score to a letter grade using standard or custom grading scales. See your letter grade, GPA points, and grade description instantly.
You just got an 87% on a test. But what letter grade is that? The answer depends on your school's grading scale. Most US schools use a standard 10-point scale where 90–100% is an A, 80–89% is a B, and so on. However, many schools use a 7-point scale, and some use custom thresholds.
This number-to-letter grade converter takes your percentage score and maps it to the appropriate letter grade on the standard US grading scale. It also shows the corresponding GPA points so you can immediately understand the impact on your GPA.
Whether you're a student checking your grade after a test, a parent interpreting a report card, or a teacher verifying grade assignments, this converter provides an instant, accurate translation from numbers to letters.
Students, parents, and educators all gain valuable perspective from precise number to letter grade data when planning academic paths, managing workloads, or setting realistic performance goals. Return to this calculator each semester or grading period to stay on top of evolving academic targets.
Different schools, districts, and even individual teachers may use slightly different grading scales. By converting your numeric score to a letter grade, you can quickly compare your performance against standard academic expectations. This is especially useful when transferring between schools or applying to colleges that need standardized grade information. Real-time results let you test different scenarios instantly, helping you set achievable goals and build an effective plan for academic success.
Standard 10-Point Scale: A+ = 97–100%, A = 93–96%, A− = 90–92% B+ = 87–89%, B = 83–86%, B− = 80–82% C+ = 77–79%, C = 73–76%, C− = 70–72% D+ = 67–69%, D = 63–66%, D− = 60–62% F = 0–59%
Result: B+
An 87% falls in the B+ range (87–89%) on the standard grading scale. This corresponds to 3.3 grade points on the 4.0 GPA scale. To reach an A− (90%), the student would need 3 more percentage points.
The two most common grading scales are the 10-point scale (A = 90–100%) and the 7-point scale (A = 93–100%). The 10-point scale is more generous and widely used in public schools. The 7-point scale is common in competitive high schools and many colleges, where it takes a higher percentage to earn each letter grade.
Grade inflation refers to the trend of awarding higher grades for the same quality of work over time. Many colleges have seen average GPAs rise from 2.5 in the 1960s to over 3.3 today. Understanding your school's grading culture helps contextualize your percentage scores.
Other countries use different percentage scales. In the UK, 70%+ is a First Class Honours (equivalent to an A). In Germany, 90%+ is a 1.0 (excellent). In India, 60%+ is a First Class. When converting international grades, use institution-specific equivalency tables rather than simple percentage mapping.
On the standard 10-point scale, yes—90–100% is an A range. However, some schools use a 7-point scale where 93%+ is required for an A. Always check your school's specific scale.
Most schools consider 60% (D−) the minimum passing grade. However, many programs require a C (73%) or higher for major-specific courses. Graduate programs often require a B (83%) or higher.
Each letter grade maps to grade points: A=4.0, B=3.0, C=2.0, D=1.0, F=0.0. Plus/minus modifiers add or subtract 0.3. These grade points are used to calculate your GPA.
Scores above 100% (due to extra credit) still map to A+. However, the extra points above 100 don't add additional GPA benefit on the standard 4.0 scale.
Yes. The difference between a B+ (3.3) and a B− (2.7) is 0.6 grade points per credit hour. Over a full semester, that can significantly impact your GPA.
Check your school's academic catalog or your course syllabus. The most common scales in the US are the 10-point scale (A=90+) and the 7-point scale (A=93+).