Course Grade Calculator
Use this calculator to determine your overall course grade based on your scores in different categories and their respective weights. Enter your achieved scores, the total possible scores, and the weight for each category.
Understanding Your Course Grade
A course grade calculator is an essential tool for students to monitor their academic progress and understand how different assignments contribute to their final mark. Most courses use a weighted grading system, where various components like homework, quizzes, midterms, and final exams are assigned a specific percentage of the overall grade.
How Weighted Grades Work
In a weighted grading system, not all assignments are created equal. For example, a final exam might be worth 40% of your grade, while a series of homework assignments combined might only be worth 20%. To calculate your overall grade, you first determine your percentage score for each category (e.g., if you got 85 out of 100 on homework, that's 85%). Then, you multiply each category's percentage score by its assigned weight. Finally, you sum up these weighted scores to get your total course grade.
The formula for a weighted average grade is:
Overall Grade = (Category 1 Score % × Category 1 Weight %) + (Category 2 Score % × Category 2 Weight %) + ...
It's crucial that the sum of all category weights equals 100% for an accurate calculation of your final grade.
Why Use a Grade Calculator?
- Track Progress: See where you stand at any point in the semester.
- Identify Weaknesses: Understand which categories are pulling your grade down.
- Plan for Success: Determine what scores you need on future assignments (e.g., the final exam) to achieve a desired overall grade.
- Reduce Stress: Gain clarity on your academic standing, reducing anxiety about your final mark.
Example Calculation:
Let's consider a student with the following scores and weights:
- Homework: 85/100 (85%) with a 20% weight
- Quizzes: 78/90 (86.67%) with a 15% weight
- Midterm Exam: 92/100 (92%) with a 30% weight
- Final Exam: 88/100 (88%) with a 35% weight
The calculation would be:
- Homework Contribution: (85 / 100) * 0.20 = 0.17
- Quizzes Contribution: (78 / 90) * 0.15 = 0.13
- Midterm Contribution: (92 / 100) * 0.30 = 0.276
- Final Exam Contribution: (88 / 100) * 0.35 = 0.308
Overall Grade = 0.17 + 0.13 + 0.276 + 0.308 = 0.884
This translates to an 88.4% overall grade, which would typically be a B+ or A- depending on the grading scale.
Use the calculator above to input your own specific course details and instantly see your current or projected grade!
.grade-calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 800px;
margin: 20px auto;
padding: 25px;
background-color: #f9f9f9;
border-radius: 10px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
color: #333;
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color: #2c3e50;
margin-bottom: 25px;
font-size: 2em;
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.grade-calculator-container h3 {
color: #34495e;
margin-top: 25px;
margin-bottom: 15px;
font-size: 1.4em;
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.calculator-form .input-group {
background-color: #ffffff;
border: 1px solid #e0e0e0;
border-radius: 8px;
padding: 20px;
margin-bottom: 20px;
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font-weight: bold;
color: #555;
font-size: 0.95em;
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.calculator-form .input-group input[type="number"] {
width: calc(100% – 22px);
padding: 10px;
margin-bottom: 15px;
border: 1px solid #ccc;
border-radius: 5px;
box-sizing: border-box;
font-size: 1em;
}
.calculator-form button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #28a745;
color: white;
border: none;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease;
margin-top: 20px;
}
.calculator-form button:hover {
background-color: #218838;
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.result-output {
margin-top: 25px;
padding: 20px;
background-color: #e9f7ef;
border: 1px solid #d4edda;
border-radius: 8px;
font-size: 1.2em;
font-weight: bold;
text-align: center;
color: #155724;
}
.result-output strong {
color: #0a3d14;
}
.grade-article {
margin-top: 40px;
padding-top: 20px;
border-top: 1px solid #eee;
line-height: 1.7;
color: #444;
}
.grade-article p {
margin-bottom: 15px;
}
.grade-article ul {
list-style-type: disc;
margin-left: 20px;
margin-bottom: 15px;
}
.grade-article ul li {
margin-bottom: 8px;
}
.grade-article code {
background-color: #eef;
padding: 2px 5px;
border-radius: 3px;
font-family: 'Courier New', Courier, monospace;
color: #c7254e;
}
function calculateGrade() {
var totalWeightedScore = 0;
var totalWeightPercentage = 0;
var resultDiv = document.getElementById('gradeResult');
resultDiv.innerHTML = "; // Clear previous results
var categories = [
{ scoreId: 'score1', totalId: 'total1', weightId: 'weight1', name: 'Category 1 (Homework)' },
{ scoreId: 'score2', totalId: 'total2', weightId: 'weight2', name: 'Category 2 (Quizzes)' },
{ scoreId: 'score3', totalId: 'total3', weightId: 'weight3', name: 'Category 3 (Midterm Exam)' },
{ scoreId: 'score4', totalId: 'total4', weightId: 'weight4', name: 'Category 4 (Final Exam)' }
];
var isValid = true;
for (var i = 0; i < categories.length; i++) {
var score = parseFloat(document.getElementById(categories[i].scoreId).value);
var total = parseFloat(document.getElementById(categories[i].totalId).value);
var weight = parseFloat(document.getElementById(categories[i].weightId).value);
if (isNaN(score) || isNaN(total) || isNaN(weight) || score < 0 || total <= 0 || weight < 0) {
resultDiv.innerHTML = '
Error: Please enter valid positive numbers for all scores, totals, and weights. Total Possible Score must be greater than 0.';
isValid = false;
break;
}
if (score > total) {
resultDiv.innerHTML = '
Error: Achieved Score for ' + categories[i].name + ' cannot be greater than Total Possible Score.';
isValid = false;
break;
}
var categoryPercentage = (score / total);
totalWeightedScore += categoryPercentage * (weight / 100);
totalWeightPercentage += weight;
}
if (!isValid) {
return;
}
if (totalWeightPercentage === 0) {
resultDiv.innerHTML = '
Error: Total weight percentage cannot be zero. Please assign weights to categories.';
return;
}
// Normalize if weights don't sum to 100, but for a grade calculator, they usually should.
// If weights sum to 100, totalWeightedScore is already the final grade.
// If they don't, we'll calculate based on the sum of provided weights.
var overallGrade = (totalWeightedScore / (totalWeightPercentage / 100)) * 100;
var letterGrade = ";
if (overallGrade >= 90) {
letterGrade = 'A';
} else if (overallGrade >= 80) {
letterGrade = 'B';
} else if (overallGrade >= 70) {
letterGrade = 'C';
} else if (overallGrade >= 60) {
letterGrade = 'D';
} else {
letterGrade = 'F';
}
var weightWarning = ";
if (totalWeightPercentage !== 100) {
weightWarning = '
Warning: The sum of your category weights is ' + totalWeightPercentage.toFixed(2) + '%. For a true weighted average, this should ideally be 100%.';
}
resultDiv.innerHTML =
'Your Overall Course Grade:
' + overallGrade.toFixed(2) + '%' +
'Equivalent Letter Grade:
' + letterGrade + '' +
weightWarning;
}