General
Grade Calculator
Calculate your final grade based on assignment scores and their weights. Track your academic performance and predict final grades easily.
Reviewed by the calculator.uk.com Team · Last reviewed 23 July 2026 · Our methodology
Enter your grades and weights to calculate your final grade
Related to Grade Calculator
The Grade Calculator uses a weighted average system to compute your final grade based on individual assignment scores and their respective weights. This method ensures that assignments with higher weights (importance) have a proportionally greater impact on your final grade.
Weighted Average Formula
Final Grade = Σ(Assignment Score × Assignment Weight%) ÷ 100
For example, if you have a midterm worth 30% where you scored 85%, and a final exam worth 70% where you scored 92%, your final grade would be: (85 × 0.30) + (92 × 0.70) = 25.5 + 64.4 = 89.9%
The calculator provides both a percentage grade and its corresponding letter grade based on the standard academic grading scale. Understanding both formats helps you better assess your academic performance and requirements for your educational goals.
Standard Letter Grade Scale
- A (93-100%)
- A- (90-92.9%)
- B+ (87-89.9%)
- B (83-86.9%)
- B- (80-82.9%)
- C+ (77-79.9%)
- C (73-76.9%)
- C- (70-72.9%)
- D+ (67-69.9%)
- D (63-66.9%)
- D- (60-62.9%)
- F (0-59.9%)
1. Why do my assignment weights need to total 100%?
The total weight must equal 100% to ensure accurate grade calculation. This represents the entire course grade, where each assignment contributes a portion of the total. If weights don't total 100%, the calculation would be incomplete or inaccurate.
2. How can I calculate my required score on a final exam?
Enter all your known grades and weights, then adjust the final exam score until you reach your desired final grade. This helps you determine what score you need to achieve your target grade in the course.
3. What if my school uses a different grading scale?
While this calculator uses a standard grading scale, you can still use the percentage grade and apply your school's specific letter grade cutoffs. The weighted average calculation remains accurate regardless of the letter grade scale used.
4. Can I calculate grades for multiple courses?
Yes, you can calculate grades for each course separately. For calculating an overall GPA across multiple courses, you would need to use a GPA calculator that takes into account credit hours and grade points.
5. What is the scientific source for this calculator?
The weighted average used here, multiplying each grade by its weight or credit value, summing the results, and dividing by the total weight, is standard arithmetic taught in any introductory statistics or educational-measurement course, not a proprietary formula. The letter-grade cutoffs follow the common American convention (90%+ = A, 80 to 89% = B, and so on), though individual schools and instructors often set their own thresholds. Because grading scales aren't universally standardized, this calculator reflects widely used convention rather than a single mandated standard.