Semester Grade Calculator
Use this semester grade calculator to combine your quarter grades and final exam into one semester grade.
- Free
- No sign-up
- We never receive your grades
Score needed on the final for each grade
| Grade | Minimum percent | Score needed |
|---|---|---|
| A | 90% | — |
| B | 80% | — |
| C | 70% | — |
| D | 60% | — |
| F | 0% | — |
Enter your quarter grades to see these.
Your school’s rule
Montgomery County Public Schools regulation IKA-RA. Its A starts at 89.5, so check My teacher rounds .5 up to match.
Some schools combine letter grades with a table instead of percents. Check your school’s handbook.
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How to use this semester grade calculator
Enter your two quarter grades. Add your final exam score if you have it. Your semester grade updates as you type.
- Type each grade as a percent, like 88, or as points, like 264/300.
- Leave the final blank to see the score you need on it for each letter.
- Under Your school's rule, pick a rule below or type your school's weights. Check No final exam if you are exempt or your course has none.
How a semester grade is calculated
Multiply each part by its weight, add the results, then divide by the total weight.
Semester grade = (Q1 × Q1 weight + Q2 × Q2 weight + Final × Final weight) ÷ total weight
Made-up example with 40/40/20: Quarter 1 is 88, Quarter 2 is 84 and the final is 78.
(88 × 40 + 84 × 40 + 78 × 20) ÷ 100 = (3,520 + 3,360 + 1,560) ÷ 100 = 84.40%, a B on a 10-point scale.
What you need on the final
Before the final, the two quarters make up 80% of the grade in a 40/40/20 rule. In the example they average 86, which is worth 86 × 0.80 = 68.8 points.
- For an 80: (80 − 68.8) ÷ 0.20 = 56% on the final.
- For a 90: (90 − 68.8) ÷ 0.20 = 106%. That is only possible with bonus points.
The table under the result does this for every letter on your scale. For a course grade that is not split into quarters, use the Final Grade Calculator.
Schools use different weights
Schools set their own weights. These rules are published by the schools themselves and work from percents:
| Rule | Quarter 1 | Quarter 2 | Final exam |
|---|---|---|---|
| Montgomery County, Maryland, courses with a state exam | 40% | 40% | 20% |
| Montgomery County, Maryland, other courses | 50% | 50% | None |
| Kimball High School, Dallas ISD, Texas | 42.5% | 42.5% | 15% |
Some schools let students skip the final. At North Mecklenburg High School in Charlotte-Mecklenburg Schools, an exempt student's grade is 50% quarter 1 and 50% quarter 2, and a final that is taken counts 20%. Check No final exam in the tool for that case.
Some schools combine letter grades instead
Some districts, such as these three, turn each quarter and the exam into a letter first, then combine the letters. Then a 90 and a 99 in a quarter count the same, and the result near a cutoff can differ from this calculator's.
- Howard County, Maryland: 45% each quarter and 10% for the final exam, as grade points (A = 4).
- Broward County, Florida: 37.5% each quarter and 25% for the exam, added up as points for each letter.
- Hillsborough County, Florida: printed charts of quarter and exam letters, with the exam at 25%, or 30% in courses with a state exam.
Howard County's own example: quarters of C and B and an exam of C give (2 × 4.5 + 3 × 4.5 + 2) ÷ 10 = 2.45, which is a C. If your school works this way, use its chart or handbook for the final letter, and this calculator to see where your percents stand.
See Does an 89.5 Round Up to a 90? for how schools round a grade that lands between two letters.
Related tools and guides
- Final Grade Calculator: Find out what you need on the final.
- Grade Calculator: Find your current grade from your assignments.
- GPA Calculator: Calculate your term and cumulative college GPA.
- Does an 89.5 Round Up to a 90? How Grade Rounding Works
- How to Raise Your GPA
Sources
- IKA-RA Grading and Reporting, Montgomery County Public Schools
- Grading Information, Kimball High School
- Regulation IKA-RA Grading and Reporting FAQs, School-Year 2025-2026, Montgomery County Public Schools
- Policy 8020 Grading and Reporting: Middle and High School - HCPSS
- High School Grading & Grade Point Averages, Broward County Public Schools
- Student Progression Plan 2026-2027, Hillsborough County Public Schools
- Final Exam Exemption Information, North Mecklenburg High School
Every rule these tools use, and how each number is worked out, is on How we calculate.
Cite this page
GradeCat. (2026, November 4). Semester Grade Calculator. https://gradecat.com/semester-grade-calculator/
Last updated 2026-11-04. Results are estimates, not official grades. Your school may use different rules. Found a wrong result? Report it.