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Quarter Grade Calculator
Work out your quarter grade from assignments, quizzes and tests within the quarter.
StudentsWeights total: 100% — matches a standard syllabus.
Weighted course grade on the US standard scale
Quarter grades close out every nine weeks in many schools, and students usually want the number before the report card arrives. This calculator rebuilds the quarter from its parts: homework, classwork, quizzes, tests and projects, each with its score and the weight your teacher gives it. Add the rows that match your class, and your quarter percentage and letter grade update as you go.
How to use the Quarter Grade Calculator
- Add a row for each type of work in the quarter.
- Enter your average score for that type of work.
- Enter the weight your teacher assigns it.
- Read your quarter percentage and letter grade.
Formula
If your teacher averages everything equally, give every row the same weight and the formula becomes a simple mean of the quarter work.
Worked example
In one quarter you have homework at 94% (weight 10), classwork at 89% (weight 20), quizzes at 81% (weight 30) and tests at 77% (weight 40). The quarter grade is (94 x 10 + 89 x 20 + 81 x 30 + 77 x 40) / 100 = (940 + 1780 + 2430 + 3080) / 100 = 82.3%, a B-. The test category decides the outcome, as it usually does.
Good to know
A quarter is short, which makes early scores volatile: two graded items in week one can show an A or an F that will not survive the term. Judge a quarter grade only once tests and projects are in. If your school reports quarters but calculates the semester from them, keep your quarter percentages; the Semester Grade Calculator combines two quarters and the exam into the grade that reaches your transcript.
US grading scale reference
The table below is the US plus/minus scale used across this site. Where this tool offers other scales, the Canadian scale sets an A from 85% with a pass at 50%, and the Australian scale uses the bands HD (85%+), D (75-84%), C (65-74%), P (50-64%) and F (below 50%) on a 7.0 GPA.
| Letter grade | Percentage | GPA points |
|---|---|---|
| A+ | 97–100% | 4.0 |
| A | 93–96% | 4.0 |
| A- | 90–92% | 3.7 |
| B+ | 87–89% | 3.3 |
| B | 83–86% | 3.0 |
| B- | 80–82% | 2.7 |
| C+ | 77–79% | 2.3 |
| C | 73–76% | 2.0 |
| C- | 70–72% | 1.7 |
| D+ | 67–69% | 1.3 |
| D | 63–66% | 1.0 |
| D- | 60–62% | 0.7 |
| F | 0–59% | 0.0 |
Frequently asked questions
How is a quarter grade calculated?
It is the weighted average of the work completed in that nine-week period, using the category weights in your class syllabus: tests usually weigh most, then quizzes, classwork and homework.
How long is a quarter in school?
A quarter is typically nine weeks, a fourth of the school year. Two quarters make a semester, and quarter grades are often averaged into the semester grade.
Why is my quarter grade changing so fast?
Early in the quarter there are few graded items, so each one counts heavily. As tests and projects are added, the grade stabilises toward your typical performance.
Does the quarter grade affect GPA?
Usually not directly. Most schools record semester or year grades for GPA, with quarters as progress reports, but some districts do record quarter grades, so check your handbook.
Can I recover from a bad first quarter?
Yes, within the semester formula a strong second quarter counts the same as the first. See the semester calculator for how the two quarters and the exam combine.
Go deeper
Prefer the full walkthrough? Read our guide: How to Calculate Your Final Grade — it explains the method step by step with more worked examples.
Sources & further reading
- College Board BigFuture — How to Calculate Your GPA on a 4.0 Scale — The most widely cited US reference for letter-grade to 4.0-scale conversion.
- National Center for Education Statistics (US Department of Education) — Official US education data on grading, attainment and outcomes.
Related tools
Last reviewed: November 2026. Results from this calculator are estimates based on the published scales above; your school's recorded grade is the official one.