USA Grading System: Complete Guide (2025)
The United States education system uses a standardized grading system that combines letter grades, percentage scores, and Grade Point Averages (GPAs). This comprehensive guide explains how the American grading system works across different educational levels and provides context for international students and educators.
Key Takeaways
- US schools primarily use a letter grading system (A through F) alongside a 4.0 GPA scale
- Most institutions consider A (4.0) as excellent, B (3.0) as good, C (2.0) as satisfactory, D (1.0) as poor, and F (0.0) as failing
- Many high schools offer weighted GPAs for advanced courses, potentially exceeding 4.0
- Most colleges and universities require a minimum 2.0 GPA to maintain good academic standing
- The system emphasizes continuous assessment through assignments, tests, and participation rather than just final exams
Understanding the US Letter Grade System
The American education system primarily uses letter grades to evaluate student performance. Each letter grade corresponds to a percentage range and a grade point value on the 4.0 scale.
| Letter Grade | Percentage | GPA (4.0 Scale) | Performance Level |
|---|---|---|---|
| A+ | 97-100% | 4.0 | Excellent |
| A | 93-96% | 4.0 | Excellent |
| A- | 90-92% | 3.7 | Excellent |
| B+ | 87-89% | 3.3 | Good |
| B | 83-86% | 3.0 | Good |
| B- | 80-82% | 2.7 | Good |
| C+ | 77-79% | 2.3 | Satisfactory |
| C | 73-76% | 2.0 | Satisfactory |
| C- | 70-72% | 1.7 | Satisfactory |
| D+ | 67-69% | 1.3 | Poor |
| D | 63-66% | 1.0 | Poor |
| D- | 60-62% | 0.7 | Poor |
| F | 0-59% | 0.0 | Failing |
Grade Point Average (GPA) System
Understanding GPA Calculation
The Grade Point Average is a numerical representation of academic performance, calculated by:
- Converting letter grades to grade points (A=4.0, B=3.0, etc.)
- Multiplying each grade point by the number of credit hours for the course
- Adding all these numbers together
- Dividing by the total number of credit hours
GPA Example Calculation
For a semester with these courses:
- English 101: A (4.0) × 3 credits = 12.0
- Math 201: B+ (3.3) × 4 credits = 13.2
- History 100: B (3.0) × 3 credits = 9.0
- Chemistry 101: C+ (2.3) × 4 credits = 9.2
Total Grade Points: 43.4 ÷ Total Credits (14) = 3.10 GPA
Weighted vs. Unweighted GPA
Many US high schools use two types of GPA calculations:
| GPA Type | Description | Scale |
|---|---|---|
| Unweighted | Standard scale regardless of course difficulty | 0.0 - 4.0 |
| Weighted | Additional points for honors, AP, or IB courses | 0.0 - 5.0 |
Grading Across Educational Levels
Elementary School (Grades K-5)
Elementary schools often use alternative grading systems:
- E (Excellent), S (Satisfactory), N (Needs Improvement)
- Number scales (1-4)
- Descriptive feedback
- Progress reports focusing on skill development
Middle School (Grades 6-8)
Middle schools typically transition to the traditional letter grade system:
- Introduction of letter grades (A-F)
- May include +/- modifiers
- Progress reports and report cards
- Often includes behavior and effort grades
High School (Grades 9-12)
High school grading becomes more standardized:
- Letter grades with GPA calculations
- Weighted grades for advanced courses
- Cumulative GPA tracking
- Class rank based on GPA
College/University Level
Post-secondary education maintains strict grading standards:
- Standardized letter grade system
- Semester and cumulative GPA tracking
- Academic standing requirements
- Major-specific GPA requirements
Understanding Academic Standing
| Standing | Typical GPA Range | Description |
|---|---|---|
| Good Standing | 2.0+ | Meeting academic requirements |
| Academic Warning | 1.7-1.99 | At risk of probation |
| Academic Probation | Below 1.7 | Must improve or face dismissal |
Common GPA Requirements
| Purpose | Typical Minimum GPA |
|---|---|
| College Admission | 2.5-3.0 |
| Graduate School | 3.0-3.5 |
| Academic Honors | 3.5+ |
| Athletic Eligibility | 2.0 |
State-by-State Grading Variations
While the A-F letter grade system is universal across the United States, individual states and school districts have some variations in grading policies:
Regional Grading Differences
Northeastern States (NY, MA, PA, NJ, CT)
- Often use strict 93-100% for A grades
- Plus/minus system common in high schools
- Strong emphasis on weighted GPAs for AP courses
- Many districts use 100-point scale in addition to letters
Southern States (TX, FL, GA, NC, VA)
- Texas: 90-100% = A is standard
- Florida: State-mandated grading scale with A=90-100%
- Many use 7-point scale (A=93-100, B=85-92, C=77-84)
- Strong GPA weighting for dual enrollment courses
Midwestern States (IL, OH, MI, WI, MN)
- Typically use 90-100% for A grades
- 10-point scale most common
- Varied approaches to GPA weighting by district
- Some districts allow A+ (4.3) on transcripts
Western States (CA, WA, OR, CO, AZ)
- California: Most use 90-100% = A
- Strong emphasis on honors/AP course weighting
- UC/CSU systems recalculate GPAs for admissions
- Some alternative grading systems in progressive schools
🧮 Calculate Your US GPA
Use our free calculators designed for the US grading system:
Frequently Asked Questions About US Grading
What is the US grading system?
The US grading system uses letter grades (A through F) combined with a 4.0 GPA scale. A=Excellent (4.0), B=Good (3.0), C=Satisfactory (2.0), D=Poor (1.0), F=Failing (0). Most colleges require a minimum 2.0 GPA to maintain good academic standing.
What grade is 70 percent in the USA?
70% typically corresponds to a C- or C grade in the US system, equivalent to 1.7-2.0 on the 4.0 GPA scale. However, exact cutoffs can vary by state and institution. Generally: 90-100%=A, 80-89%=B, 70-79%=C, 60-69%=D, below 60%=F.
How does the GPA system work in the USA?
The GPA (Grade Point Average) system converts letter grades to numbers: A=4.0, B=3.0, C=2.0, D=1.0, F=0. Calculate GPA by: 1) Converting each grade to points, 2) Multiplying by credit hours, 3) Adding all points, 4) Dividing by total credit hours. Many high schools use weighted GPAs (up to 5.0) for honors/AP courses.
Do all US states use the same grading system?
While all US states use the A-F letter grade system and 4.0 GPA scale, specific percentage cutoffs and policies vary by state and school district. Some states have standardized grading scales (like Florida's state-mandated scale), while others allow local districts to set their own standards.
What is considered a good GPA in American schools?
A good GPA in the USA: 3.0-3.4 is good, 3.5-3.8 is very good, 3.9-4.0 is excellent. For college admission: 2.5-3.0 minimum for most colleges, 3.5+ for competitive schools, 3.8+ for elite universities. Graduate schools typically require 3.0-3.5 minimum.
What is the difference between weighted and unweighted GPA in the US?
Unweighted GPA uses a standard 0-4.0 scale for all courses. Weighted GPA (0-5.0) adds extra points for advanced courses: Regular A=4.0, Honors A=4.5, AP/IB A=5.0. Most high schools report both; colleges often recalculate to their own scale.
Can you graduate college with a GPA below 2.0?
Most US colleges require a minimum 2.0 GPA to graduate. Students who fall below this may be placed on academic probation or face dismissal. Some programs (especially graduate programs) require higher GPAs, typically 3.0 or above, for completion.
How do AP and IB courses affect GPA?
Advanced Placement (AP) and International Baccalaureate (IB) courses often use weighted grading, where an A might be worth 5.0 instead of 4.0 on a weighted scale, potentially raising a student's overall weighted GPA above 4.0. However, unweighted GPAs still cap at 4.0.
📚 Key Takeaways: US Grading System
- ✅ Standard A-F letter grades with 4.0 GPA scale (unweighted)
- ✅ Weighted GPAs up to 5.0 for honors/AP/IB courses
- ✅ State and district variations in percentage cutoffs exist
- ✅ Minimum 2.0 GPA required for college graduation
- ✅ 3.5+ GPA needed for competitive college admissions
- ✅ Continuous assessment vs. final exams only