Use this free US letter grade calculator to combine your homework, quizzes, projects and exams into one final percentage and letter grade. You can also see what score you need on the final exam to finish with an A, B, C, or to pass the class.
Typical US-style letter grades mapped roughly to a 4.0 GPA scale.
Add each assignment, quiz or exam with its percentage weight. Marks and weights are automatically clamped between 0 and 100.
| Assessment | Weight (%) | Score (%) | |
|---|---|---|---|
Weight is how much each item counts toward the final mark (these usually add up to 100). Score is the mark you received out of 100.
Choose a target overall percentage and the assessment you want to solve for. The calculator will estimate the minimum score needed on that assessment.
Copies a link that reopens this exact calculation — handy for sending to a friend or saving for later.
In many US schools, colleges and universities, your final grade in a class is based on several categories with different weights. For example, homework might be worth 20%, quizzes 20%, projects 30% and the final exam 30%. Each category has its own scores, which are combined into one overall percentage.
That final percentage is then converted into a letter grade using a scale similar to:
Exact cut-offs can vary by teacher, school or university. Some classes also use plus and minus grades (A−, B+, B−, etc.), but this calculator focuses on the core A–F bands.
You can leave future items blank and the calculator will use only completed work to estimate your current standing in the class.
One of the most common questions students ask is:
"What do I need on my final exam to get an A (or to pass)?"
The "What do I need on the final?" section is built exactly for that. Here's how to use it:
Many schools convert letter grades into a 4.0 GPA scale, where:
In reality there are often plus/minus values (like 3.7 for A− or 2.3 for C+). This calculator shows you the basic letter grade and approximate GPA band so you can quickly understand where you stand. For precise GPA calculations, always refer to your school's official policy.
If you study overseas, are in an international program, or want to compare grading systems, you might also find these useful:
This site is designed to support multiple grading systems, so you can keep track of your results no matter where you're studying.
It depends on the assignment's weight. A low score on something worth 5% of your grade has a small effect, but a low score on something worth 30-40% (like a midterm or final) can move your overall percentage a lot. Enter your assessments above to see the actual impact on your specific weights.
Not always, but it's common for final exams to be one of the heavier-weighted items in a course, often 20-40% of the final grade. Check your syllabus for the exact weight — this calculator uses whatever weight you enter, not an assumed default.
Check your course syllabus first, since instructors are usually required to publish grading weights there. If you genuinely can't find them, ask your instructor directly, or enter your best estimate — the calculator will still give you a reasonable idea of where you stand.
That depends on your target: 90%+ overall for an A, 80%+ for a B, and so on. Enter your current assessments and use the "What do I need on the final?" section to see exactly what score keeps your target grade within reach.
Switch to a different grading system – each calculator uses the same layout so it’s easy to use.