Welcome to the Gradebook Calculator! This tool helps students and educators accurately determine overall course grades by factoring in individual assignment scores and their respective weights. Understanding how your grades are calculated is crucial for academic success, and this calculator simplifies that process.
What is a Weighted Grade?
Many courses use a weighted grading system, meaning that different types of assignments (e.g., quizzes, homework, exams, projects) contribute varying percentages to your final grade. For example, an exam might be worth 40% of your grade, while homework is only 20%. This calculator takes these weights into account to give you a precise overall percentage.
How to Use the Calculator:
Assignment Name (Optional): You can label each assignment for clarity, but it's not required for the calculation.
Score Received: Enter the points or score you earned on the assignment.
Total Possible Score: Enter the maximum points or score available for that assignment.
Weight (%): Enter the percentage that this assignment category contributes to your final grade. For example, if an assignment is worth 25% of your final grade, enter "25".
Repeat for all your assignments. If you have fewer than 5 assignments, leave the extra rows blank.
Click "Calculate Grade" to see your overall percentage.
This calculator will perform these steps automatically, providing you with your accurate overall grade.
Gradebook Calculator
Your overall grade will appear here.
function calculateGrade() {
var totalWeightedScore = 0;
var totalWeightSum = 0;
var assignmentsProcessed = 0;
var errorMessage = "";
for (var i = 1; i <= 5; i++) {
var scoreId = "assign" + i + "Score";
var totalId = "assign" + i + "Total";
var weightId = "assign" + i + "Weight";
var scoreInput = document.getElementById(scoreId).value;
var totalInput = document.getElementById(totalId).value;
var weightInput = document.getElementById(weightId).value;
// Check if all three numeric fields for an assignment are empty. If so, skip this row.
if (scoreInput === "" && totalInput === "" && weightInput === "") {
continue;
}
var score = parseFloat(scoreInput);
var total = parseFloat(totalInput);
var weight = parseFloat(weightInput);
// Validate inputs for the current row
if (isNaN(score) || isNaN(total) || isNaN(weight)) {
errorMessage += "Please enter valid numbers for Score, Total Possible Score, and Weight for Assignment " + i + ".";
continue; // Skip this row if inputs are invalid
}
if (total <= 0) {
errorMessage += "Total Possible Score for Assignment " + i + " must be greater than 0.";
continue;
}
if (weight < 0) {
errorMessage += "Weight for Assignment " + i + " cannot be negative.";
continue;
}
// If all inputs for this row are valid, process it
totalWeightedScore += (score / total) * weight;
totalWeightSum += weight;
assignmentsProcessed++;
}
var resultDiv = document.getElementById("gradeResult");
if (errorMessage !== "") {
resultDiv.style.color = "red";
resultDiv.innerHTML = errorMessage;
return;
}
if (assignmentsProcessed === 0) {
resultDiv.style.color = "#333";
resultDiv.innerHTML = "Please enter at least one assignment's details to calculate your grade.";
return;
}
if (totalWeightSum === 0) {
resultDiv.style.color = "red";
resultDiv.innerHTML = "The sum of all assignment weights cannot be zero. Please enter valid weights.";
return;
}
var finalGrade = (totalWeightedScore / totalWeightSum) * 100;
resultDiv.style.color = "#333";
resultDiv.innerHTML = "Your Overall Grade: " + finalGrade.toFixed(2) + "%";
}