Grade Calculator
A grade calculator for any class graded by weighted categories: enter each category's weight from the syllabus and your score, and get your grade and letter.
Result
Your class grade
86.45% B
B on the College Board 4.0 scale. All 100% of the weight is counted.
Letter grade
- Grade points
- 3.00
Weights
- Weight entered so far
- 100%
Worked out in your browser. Nothing you type is sent to us.
The working
(15 × 95 + 25 × 84 + 40 × 78 + 20 × 100) ÷ 100 = 86.45%
| Category | Weight | Score | Adds to grade |
|---|---|---|---|
| Homework | 15% | 95% | 14.25 |
| Quizzes | 25% | 84% | 21 |
| Tests | 40% | 78% | 31.20 |
| Participation | 20% | 100% | 20 |
| Total | 100% | 86.45% |
How do you calculate a weighted grade?
Multiply each category's score by its weight, add the results, and divide by the total weight. In the example above, homework, quizzes, tests and participation weighted 100% in all give a class grade of 86.45%, a B.
Grade = (weight₁ × score₁ + weight₂ × score₂ + …) ÷ (weight₁ + weight₂ + …)
Worked example: four categories
(15 × 95 + 25 × 84 + 40 × 78 + 20 × 100) ÷ 100 = 86.45%
In the working table under the calculator, each row's last column is its weight × score ÷ the total weight: what that category adds to your grade. The tests are worth the most, so a 78% there pulls the grade down more than the perfect participation score lifts it.
When the weights don't add up to 100%
Part-way through a term, some categories have no scores yet. Leave their score blank: the calculator counts only the categories you have scores for and scales them up, which is how most grade portals show your current grade. To see what you need on what's left, use the final grade calculator.
Scores as points
Type a score as points earned over points possible, such as 46/50, and it is turned into a percentage (92%). For a class graded only by total points, use one category with weight 100 and enter all your points, for example 412/450.
Percentages to letter grades
College Board 4.0 chart (A 90–100, B 80–89, C 70–79, D 65–69)
| Grade | Percent | Grade points |
|---|---|---|
| A | 90–100 | 4.0 |
| B | 80–89 | 3.0 |
| C | 70–79 | 2.0 |
| D | 65–69 | 1.0 |
| F | below 65 | 0.0 |
Source: College Board BigFuture: How to Convert Your GPA to a 4.0 Scale, checked October 18, 2026. College Board calls this one commonly used system and says your school may differ. Its chart lists D as 66–69 and E/F as below 65, which leaves 65 itself unassigned; we count 65 as a D. The chart has no plus or minus grades, so B+ counts as a B on this scale.
10-point scale (A 90–100, B 80–89, C 70–79, D 60–69), as used statewide in North Carolina
| Grade | Percent | Grade points | Honors | AP / IB / college |
|---|---|---|---|---|
| A | 90–100 | 4.0 | 4.5 | 5.0 |
| B | 80–89 | 3.0 | 3.5 | 4.0 |
| C | 70–79 | 2.0 | 2.5 | 3.0 |
| D | 60–69 | 1.0 | 1.5 | 2.0 |
| F | below 60 | 0.0 | 0.0 | 0.0 |
Source: Onslow County Schools (NC): Grading Scale, under NC State Board of Education policy GRAD-009, checked October 18, 2026. Quality points: standard A 4, B 3, C 2, D 1, F 0; honors add 0.5; AP, IB and college (CCP) courses add 1.0; an F earns 0 at every level. Weights: Source: NC Department of Public Instruction: AP/IB/CIE Coursework, checked October 18, 2026. "The state course weighting system awards the equivalent of one (1) quality point to the grade earned in an AP/IB/CIE course." The 0.5 honors weight is from the Onslow County table above.
Plus/minus scale (A 93–100, A- 90–92 … D- 60–62), as used by Green Bay Area Public Schools, Wisconsin
| Grade | Percent | Grade points |
|---|---|---|
| A | 93–100 | 4.0 |
| A- | 90–92 | 3.67 |
| B+ | 87–89 | 3.33 |
| B | 83–86 | 3.0 |
| B- | 80–82 | 2.67 |
| C+ | 77–79 | 2.33 |
| C | 73–76 | 2.0 |
| C- | 70–72 | 1.67 |
| D+ | 67–69 | 1.33 |
| D | 63–66 | 1.0 |
| D- | 60–62 | 0.67 |
| F | below 60 | 0.0 |
Source: Green Bay Area Public Schools (WI): Grading Scale, checked October 18, 2026. Green Bay gives the plus and minus grades in thirds of a point (A- 3.67, B+ 3.33); many schools round these to 3.7 and 3.3, so check your own handbook. F* (fail, no credit), P (pass), INC (incomplete), MX (medical excuse) and NG (no grade) are not counted in GPA. The page sets no honors or AP weighting: the weighting boxes in the calculator are your school's rules. Not counted in GPA: F*, P, INC, MX, NG.
Questions students ask
Is my grade the same as the average of my scores?
Which letter grade scale should I pick?
Can a score be above 100%?
Sources and method
- College Board 4.0 chart (A 90–100, B 80–89, C 70–79, D 65–69). Source: College Board BigFuture: How to Convert Your GPA to a 4.0 Scale, checked October 18, 2026. College Board calls this one commonly used system and says your school may differ. Its chart lists D as 66–69 and E/F as below 65, which leaves 65 itself unassigned; we count 65 as a D. The chart has no plus or minus grades, so B+ counts as a B on this scale.
- 10-point scale (A 90–100, B 80–89, C 70–79, D 60–69), as used statewide in North Carolina. Source: Onslow County Schools (NC): Grading Scale, under NC State Board of Education policy GRAD-009, checked October 18, 2026. Quality points: standard A 4, B 3, C 2, D 1, F 0; honors add 0.5; AP, IB and college (CCP) courses add 1.0; an F earns 0 at every level.
- Course weights. Source: NC Department of Public Instruction: AP/IB/CIE Coursework, checked October 18, 2026. "The state course weighting system awards the equivalent of one (1) quality point to the grade earned in an AP/IB/CIE course." The 0.5 honors weight is from the Onslow County table above.
- Plus/minus scale (A 93–100, A- 90–92 … D- 60–62), as used by Green Bay Area Public Schools, Wisconsin. Source: Green Bay Area Public Schools (WI): Grading Scale, checked October 18, 2026. Green Bay gives the plus and minus grades in thirds of a point (A- 3.67, B+ 3.33); many schools round these to 3.7 and 3.3, so check your own handbook. F* (fail, no credit), P (pass), INC (incomplete), MX (medical excuse) and NG (no grade) are not counted in GPA. The page sets no honors or AP weighting: the weighting boxes in the calculator are your school's rules.
- Formula. A weighted average: Σ(weight × score) ÷ Σ(weight), over categories that have both a weight and a score.