Grade Calculator

1. Enter each grade. Type a percent (88), a letter (B+) or points earned over points possible (45/50). Use one row per category or per assignment.
2. Add the weights from your syllabus. Type each category weight, such as 20 for homework worth 20%. Leave every weight blank to average the grades equally.
3. Optionally add the final. Enter the final exam weight and the course grade you want. The tool shows the final score you need and the best and worst course grade still possible.

A weighted class grade is an average in which each category counts in proportion to its share of the course. A midterm worth 30% moves your grade three times as much as a quiz set worth 10%.

A syllabus lists these shares. A Northern Arizona University course guide uses a typical scheme: assignments 35%, midterm exams 40%, final exam 20% and participation 5%. At the end of term the course grade is the weighted sum of all four.

When every item counts the same, the weighted average becomes a plain mean. OpenStax Prealgebra 2e shows it with test scores of 85, 88 and 94: the sum is 267, and 267 / 3 gives a mean of 89.

A class grade is not a GPA. GPA converts letter grades from many classes into grade points; the GPA calculator does that step once your class grades are known.

It multiplies each grade by its weight, adds the products and divides by the weight graded so far. That division is what makes a mid-term grade meaningful.

1. Convert each grade to a percent. Points become earned / possible x 100; letters become the middle of their band.
2. Multiply each percent by its weight and add the products.
3. Divide by the total weight entered. The NAU guide divides by 0.75 when only 75% of the course is graded.
4. For the final, the graded work counts for (1 - F) of the course and the final for F. Solve for the final score that reaches the goal.

With no final weight entered, the tool assumes the final is the part of the course not yet graded.

A student has homework at 90% (weight 20%), quizzes at 80% (20%) and a midterm at 85% (30%). The final exam is worth the remaining 30%.

1. Weighted sum: 90 x 20 + 80 x 20 + 85 x 30 = 1800 + 1600 + 2550 = 5950.
2. Weight graded: 20 + 20 + 30 = 70.
3. Current grade: 5950 / 70 = 85%, a B.
4. Goal 80%: (80 - 85 x 0.70) / 0.30 = (80 - 59.5) / 0.30 = 68.33% on the final.
5. Goal 90%: (90 - 59.5) / 0.30 = 101.67%, which is not reachable.

A perfect final would give 59.5 + 30 = 89.5%, and a zero would leave 59.5%. That range is the honest picture before the exam.

Weights, the letter scale and course policies move the number more than a single assignment does.

Category Weights

A heavy final can swing a course grade by many points. With a 30% final, each 10 points on the exam moves the course grade by 3 points.

Equal vs Weighted Averaging

The same scores give different results under each method. 95 on a small quiz and 75 on a big exam average to 85 equally, but to 79 if the exam carries 80% of the weight.

The Letter Scale

College Board shows one common 4.0-scale chart with A at 90 to 100, D at 66 to 69 and E/F below 65, and says schools use different cutoffs. The letter here is a guide, not your official grade.

Drops, Curves and Extra Credit

Dropped lowest scores, curves and extra credit all change the math. Enter the scores that actually count, or model a curve with the grade curve calculator.

A points-based course is already weighted by points: a 200-point exam counts twice a 100-point one. The weighted average calculator handles weighted means outside the classroom.

Mid-Term Check-Ins

Partway through a term, the tool gives your standing on the work graded so far, a question the NAU guide says every professor hears a lot.

Before the Final Exam

Knowing you need 68% instead of 93% changes how you plan study time. The dedicated final grade calculator covers the single-question version.

Checking the Gradebook

Learning platforms sometimes treat missing work as zero or leave out empty categories. Recomputing by hand shows which one applies.

Choosing Where to Focus

The weights show which category has the most room to lift your grade before the term ends.

1. Averaging Categories Equally

A plain average of category scores ignores the syllabus weights and can be several points off.

2. Not Dividing by the Weight Graded

Mid-term, the weighted sum covers only part of the course. Dividing by 100 instead of the weight graded makes a strong student look like they are failing.

3. Mixing Points and Percents

Enter 45/50, or 90, but not 45 when the item was out of 50.

4. Using the Wrong Letter Scale

An 89.5 is a B+ on this scale but may round to an A- under a teacher who rounds up. Check the syllabus.

5. Forgetting Dropped Scores

If the lowest quiz is dropped, leave it out; keeping it understates the grade.

6. Trusting a Capped Answer

A tool that stops at 100% hides an impossible goal. This one shows the true requirement, even above 100%.

The math is exact for the grades and weights you enter; the official grade follows your instructor's rules.

Divide the weighted sum by the weights you have so far. With 75% of the course graded, divide by 75, not 100.

Enter your goal as the passing percent, often 60 or 70. The tool solves (goal - current x (1 - F)) / F.

Yes. Letters from A+ to F convert to the middle of their band, such as B+ = 88.5%. Enter a percent when you know it.

Type 18/20. The tool converts it to 90%.

Then the goal is out of reach with the final alone. The range row shows the best course grade still possible.

No. A weighted grade is one class average in percent. GPA averages grade points across classes.

On this scale it is a B+. Many teachers round 89.5 up to 90, an A-, so check your syllabus.

Each 10 points on the final moves the course grade by 2 points.

Gradebooks may count missing work as zero, drop scores or weight by points. Match those rules to compare.

No. The math runs in your browser. Save keeps a copy only in your own browser storage.

• Calculating a weighted grade in the middle of the term (Northern Arizona University course page).
• The mean of a set of test scores (OpenStax Prealgebra 2e, section 5.5).
• A common letter grade and 4.0 scale chart, and why schools differ (College Board BigFuture).