Grade Calculator
Enter your scores and weights to calculate your overall course grade instantly.
How Weighted Grades Work
A weighted grade calculator computes your overall course grade by giving different categories -- homework, quizzes, exams, projects -- different levels of importance. Each category has a weight (usually a percentage) that determines how much it counts toward your final grade.
Formula: Weighted Grade = S (Scorei / Maxi x Weighti) / Total Weight x 100
Each component's contribution equals its percentage score multiplied by its weight. The calculator sums all contributions and divides by the total weight to produce your overall grade.
Step-by-Step Example
Suppose your syllabus lists this grading breakdown:
- Homework: 20% weight -- you scored 92/100
- Quizzes: 15% weight -- you scored 78/100
- Midterm: 25% weight -- you scored 85/100
- Final Exam: 40% weight -- you scored 88/100
Calculation:
- Homework contribution: 92/100 x 20 = 18.40
- Quizzes contribution: 78/100 x 15 = 11.70
- Midterm contribution: 85/100 x 25 = 21.25
- Final Exam contribution: 88/100 x 40 = 35.20
- Sum: 18.40 + 11.70 + 21.25 + 35.20 = 86.55
- Total weight: 20 + 15 + 25 + 40 = 100
- Weighted grade: 86.55 / 100 x 100 = 86.55% (B)
Notice that the final exam (88%) pulls the grade up more than the quizzes (78%) pull it down, because the final has more than twice the weight.
What If Weights Don't Add to 100%?
If you haven't completed all components (for example, the final exam hasn't happened yet), your weights will total less than 100%. This calculator automatically normalizes by dividing by the actual total weight instead of 100. The result represents your grade on completed work only.
Using the example above, if you've completed everything except the final (total weight = 60%):
(18.40 + 11.70 + 21.25) / 60 x 100 = 85.58%
Standard Letter Grade Scale
| Letter | Percentage | GPA |
|---|---|---|
| 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 | Below 60% | 0.0 |
This is the most common scale in U.S. colleges. Some institutions use a 10-point scale (A = 90%+, B = 80%+, etc.) or omit plus/minus grades. Check your school's grading policy.
Weighted vs. Unweighted Grades
Understanding the difference helps you interpret your grades correctly:
- Unweighted (simple average): Every score counts equally. If you scored 95, 80, and 70 on three assignments, the average is (95 + 80 + 70) / 3 = 81.67%.
- Weighted average: Different categories have different importance. If those three scores are Homework (10%), Midterm (30%), and Final (60%), the weighted grade is 95 x 0.10 + 80 x 0.30 + 70 x 0.60 = 9.5 + 24 + 42 = 75.5%.
The weighted result (75.5%) is much lower than the simple average (81.67%) because the lowest score (70%) carries the most weight. This is why understanding your syllabus weights matters -- a single heavily-weighted exam can shift your grade significantly.
How to Find Your Component Weights
Your course syllabus lists the grading breakdown. Look for something like:
- Homework/Assignments: 20%
- Quizzes: 15%
- Midterm Exam: 25%
- Final Exam: 40%
If the syllabus uses points instead of percentages, divide each category's points by the total possible points:
Weight = Category Points / Total Course Points x 100
Example: If Homework is worth 150 points out of 750 total course points, Homework weight = 150 / 750 x 100 = 20%.
Common Mistakes
- Using your LMS grade when it includes a 0 for unsubmitted work. If your learning management system (Canvas, Blackboard, Moodle) shows a placeholder 0% for the final exam, your displayed grade is artificially low. Either switch to the "exclude unsubmitted" view or manually calculate using only completed components.
- Confusing points with percentages. If the final is worth 200 out of 500 total points, the weight is 200 / 500 = 40%, not 200%. Entering 200 as the weight will skew your result.
- Forgetting about extra credit. Some courses allow scores above 100% on individual components. If you earned 105/100 on homework with extra credit, enter 105 as the score and 100 as the max.
- Mixing up the score and the max. If you scored 45 out of 50, the score is 45 and the max is 50 -- not 90 out of 100. Both give the same percentage, but entering the actual values avoids mental math errors.
- Averaging category averages incorrectly. If you have 10 homework grades, first average them to get one homework score, then use that as the score for the Homework row. Don't enter each homework individually with the full category weight.
- Rounding too early. Small rounding errors in each component can add up. Let the calculator handle the math and round only the final result.
Frequently Asked Questions
How do I calculate my weighted grade?
Multiply each component's percentage score by its weight, sum the results, and divide by the total weight. For example, if Homework (20% weight) is 90/100 and Midterm (30% weight) is 78/100: weighted grade = (90/100 x 20 + 78/100 x 30) / (20 + 30) x 100 = (18 + 23.4) / 50 x 100 = 82.80%. Enter your components above for instant results.
What is a weighted grade?
A weighted grade is a course grade where different categories have different levels of importance. Each category has a weight -- typically a percentage -- that reflects how much it counts toward the final grade. A final exam worth 40% has twice the impact of homework worth 20%.
What happens if my weights don't add up to 100%?
This calculator automatically normalizes weights. If your entered weights total less than 100% (for example, if you haven't completed the final yet), the grade shown represents your performance on completed work only. If weights exceed 100%, double-check your syllabus for errors.
How do I convert my percentage grade to a letter grade?
The most common U.S. college scale is: A+ (97-100%), A (93-96%), A- (90-92%), B+ (87-89%), B (83-86%), B- (80-82%), C+ (77-79%), C (73-76%), C- (70-72%), D+ (67-69%), D (63-66%), D- (60-62%), F (below 60%). Some institutions use different scales. Check the letter grade table above or your school's grading policy.
What is the difference between weighted and unweighted grades?
An unweighted grade treats all scores equally -- a simple average. A weighted grade assigns different importance to different categories, reflecting that a final exam (often 30-50%) matters more than a quiz (often 5-10%). Most college courses use weighted grades.
How do I find my component weights?
Check your course syllabus for the grading breakdown. If it uses points instead of percentages, divide each category's points by total possible points. For example, if Homework is 200 points out of 1,000 total, its weight is 200 / 1,000 = 20%.
What if my scores aren't out of 100?
Use the "Max" column to enter the maximum possible score for each component. If you scored 45 out of 50 on a quiz, enter 45 as the score and 50 as the max. The calculator converts this to 90% before applying the weight.
How do I calculate what I need on my final exam?
Use the "What Do I Need?" mode at the top of this calculator. Enter your current grade, target grade, and the final exam's weight to see exactly what score you need. You can also use our Final Grade Calculator or read the full guide: How to Calculate Your Final Grade.
Can I use this calculator for high school grades?
Yes. The weighted grade formula works identically for high school and college. Enter your categories (tests, homework, participation, projects) with their weights from the syllabus. Note that some high schools use weighted GPA systems where honors or AP classes earn extra GPA points -- that is a different concept from weighted course grades.
How many decimal places are accurate?
This calculator displays results to two decimal places. Most instructors round final grades to one decimal or to the nearest whole number. If your grade is close to a letter-grade boundary (e.g., 89.4% vs. 89.5%), check your institution's rounding policy.
What is the standard GPA scale?
The standard U.S. 4.0 scale is: A+/A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0. Use our GPA Calculator to compute your semester or cumulative GPA.
Does this grade calculator store my data?
No. All calculations run entirely in your browser using JavaScript. Your grades, scores, and component names are never sent to any server. You can verify this by disconnecting from the internet -- the calculator works identically offline.
Related Tools
- Final Grade Calculator -- calculate the score you need on your final exam to reach your target grade
- GPA Calculator -- compute your semester or cumulative GPA from course grades and credit hours
- GPA to Percentage Converter -- convert between GPA and percentage scales
- Percentage to GPA Converter -- convert a percentage grade to its GPA equivalent
- Percentage Calculator -- calculate percentages, percentage change, and ratios
- How to Calculate Your Final Grade -- step-by-step guide with formula, examples, and strategies
- How to Calculate GPA -- complete guide to GPA formulas, grading scales, and worked examples
Privacy & Limitations
- Client-side only. No data is sent to any server. No cookies, no tracking of entered grades or component names. All calculations run in your browser using JavaScript.
- Grading scale may differ. The letter grades shown use the standard U.S. +/- scale (A+ at 97%, A at 93%, etc.). Your institution may use a different scale. Always verify against your school's official grading policy.
- This is not an official grade. Results are estimates based on the scores and weights you enter. Your official grade comes from your instructor and may include adjustments for attendance, participation, curving, or rounding that this tool does not account for.
- Weight normalization. When weights don't sum to 100%, the calculator normalizes automatically. This is useful for partial-semester calculations but may produce unexpected results if weights are entered incorrectly.
Related Tools
View all toolsPrime Number Checker
Check if a number is prime and see a quick reason
Fraction Visualizer
Visualize a fraction and see the simplified form
Multiplication Table
Generate a multiplication table up to any size
Unit Circle
Common unit circle angles with sine and cosine values
GPA Calculator
Calculate GPA from course grades and credit hours
Final Grade Calculator
Calculate required final exam score for target grade
Grade Calculator FAQ
How do I calculate my weighted grade?
Multiply each component's percentage score by its weight, sum the results, and divide by the total weight. Formula: Weighted Grade = Σ (Score_i ÷ Max_i × Weight_i) ÷ Total Weight × 100. For example, if Homework (20% weight) is 90/100 and Midterm (30% weight) is 78/100, the weighted grade is (90/100 × 20 + 78/100 × 30) ÷ 50 × 100 = (18 + 23.4) ÷ 50 × 100 = 82.8%.
What is a weighted grade?
A weighted grade is a course grade calculated by giving different components (homework, exams, projects) different levels of importance. Each component has a weight — typically a percentage — that reflects how much it counts toward the final grade. For example, if a final exam is worth 40% and homework is worth 20%, the final exam has twice the impact on your overall grade.
What happens if my weights don't add up to 100%?
If your weights total less than 100%, the calculator normalizes them — it divides by the actual total weight instead of 100. This is useful when you haven't completed all components yet (for example, the final exam hasn't happened). The grade shown represents your performance on completed work only. If weights exceed 100%, double-check your syllabus for errors.
How do I convert my percentage grade to a letter grade?
The most common scale in U.S. colleges is: A+ (97-100%), A (93-96%), A- (90-92%), B+ (87-89%), B (83-86%), B- (80-82%), C+ (77-79%), C (73-76%), C- (70-72%), D+ (67-69%), D (63-66%), D- (60-62%), F (below 60%). However, grading scales vary by institution — some use a 10-point scale (A = 90+, B = 80+, etc.) and some don't use plus/minus grades.
What is the difference between weighted and unweighted grades?
An unweighted grade treats all assignments and exams equally — each score counts the same regardless of the category. A weighted grade assigns different importance to different categories. In most college courses, grades are weighted: a final exam worth 40% has much more impact than a homework assignment worth 5%. The weighted approach better reflects the course's emphasis.
How do I find my component weights?
Check your course syllabus — it lists the grading breakdown (e.g., Homework 20%, Quizzes 15%, Midterm 25%, Final 40%). If the syllabus uses points instead of percentages, divide each category's points by the total possible points to get the weight. For example, if homework is worth 200 points out of 1,000 total, its weight is 200 ÷ 1000 = 20%.
What if my scores aren't out of 100?
Use the Max column in the calculator to enter the maximum possible score for each component. For example, if you scored 45 out of 50 on a quiz, enter 45 as the score and 50 as the max. The calculator converts this to a percentage (90%) before applying the weight.
How do I calculate what I need on my final exam?
Use the formula: Required Final Score = (Target Grade × 100 − Current Grade × (100 − Final Weight)) ÷ Final Weight. For example, if your current grade is 82%, you want a 90%, and the final is worth 40%: Required = (90 × 100 − 82 × 60) ÷ 40 = 102%. That means 90% is not reachable. Use a dedicated Final Grade Calculator for quick results.
Does this grade calculator store my data?
No. All calculations run entirely in your browser using JavaScript. Your grades, scores, and component names are never sent to any server. No cookies are set and no data is stored. You can verify this by disconnecting from the internet — the calculator works identically offline after the page loads.
Can I use this calculator for high school grades?
Yes. The weighted grade formula is the same for high school and college. Enter your categories (tests, homework, participation, projects) with their weights from the syllabus. Note that some high schools use weighted GPA systems where honors or AP classes earn extra GPA points — that is a different calculation from weighted course grades.
How many decimal places are grade calculations accurate to?
This calculator displays results to two decimal places. However, most instructors round final grades to one decimal place or to the nearest whole number. If your calculated grade is close to a letter-grade boundary (e.g., 89.4% vs. 89.5%), check your institution's rounding policy — some round up at 0.5, some don't round at all.
What is the standard GPA scale for letter grades?
The standard U.S. 4.0 GPA scale is: A+ and A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, D- = 0.7, F = 0.0. Some institutions award 4.3 for A+. Weighted GPAs at the high school level may exceed 4.0 for honors and AP courses.