Grade Calculator
Free grade calculator. Calculate your weighted class grade, find what score you need on a final exam, and convert percentage to letter grade.
Free Tool
No Sign-up
Instant Results
Grade Calculator
Assignment / CategoryScore (%)Weight (%)
Quick Percentage → Letter Grade
A+ ≥ 97%
A ≥ 93%
B+ ≥ 87%
B ≥ 83%
C+ ≥ 77%
C ≥ 73%
D ≥ 60%
F < 60%
Comprehensive Guide & Practice
Master the mathematical principles, formulas, and step-by-step methods with worked examples and FAQs.
1
1. How to Calculate Your Grade
Most classes use a weighted grading system where different assignment types (homework, exams, quizzes) count for different percentages of your final grade.
Weighted Average Formula: Final Grade = Σ(Score × Weight) ÷ Σ(Weights)
Example: Homework (90%, weight 20%), Midterm (85%, weight 30%), Final (78%, weight 50%): Grade = (90×20 + 85×30 + 78×50) / (20+30+50) = (1800+2550+3900)/100 = 82.5% = B.
2
2. Standard Grading Scale (US)
- 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 = below 60%
See also: GPA Calculator | Percentage Calculator | Average Calculator