Understanding Letter Grades: What A, B, C, D, and F Actually Mean

An A is an A, right? Not exactly. The percentage range for an A varies by institution, country, and even individual instructor. And whether a B is "good" depends entirely on what you're trying to achieve.

Standard US Letter Grade Scale

This scale is common but not universal. Some institutions use 90–100% for A, others use 92–100%. Some don't use plus/minus grades at all.

How Grade Scales Vary

Some universities use:

• A: 90–100% (more common at larger universities)
• B: 80–89%
• C: 70–79%
• D: 60–69%
• F: Below 60%

Some high schools use:

• A: 93–100%
• B: 85–92%
• C: 76–84%
• D: 68–75%
• F: Below 68%

Always check your specific institution's grading scale — it matters for borderline grades.

What Each Grade Actually Communicates

A (Excellent): Demonstrates thorough mastery of the material. In competitive academic contexts, A grades often indicate top-tier performance.

B (Good/Above Average): Solid understanding with some gaps. In many professional programs (medical, law, MBA), a B average is competitive. In undergraduate contexts, B grades are often the most common.

C (Average/Satisfactory): Basic competency. Meets minimum course requirements. Acceptable for general education requirements but may not satisfy major requirements. Graduate school generally requires B or better.

D (Below Average/Passing): Minimal passing grade in most systems. Often doesn't satisfy major or prerequisite requirements. Many programs require a C or better in required courses.

F (Failing): Does not meet minimum requirements. Course must typically be retaken if required for degree. Significantly damages GPA.

Grade Inflation: Why Context Matters

Average grades at US universities have risen significantly over decades. What was a B average in 1960 might be a C by today's distribution standards at many institutions.

This means grades communicate differently depending on the institution and course:

• A B in a notoriously difficult course may be more impressive than an A in an easy one
• A 3.5 GPA at a highly selective school may represent more achievement than a 3.9 at a less selective one
• Graduate schools and employers increasingly look at the difficulty of courses, not just the grades

Calculate your weighted grade average with our Grade Calculator.