Use this calculator to determine your Grade Point Average (GPA) based on your course grades and credit hours. Simply enter the letter grade you received for each course and its corresponding credit hours, then click "Calculate GPA".
Understanding Your GPA
Your Grade Point Average (GPA) is a numerical representation of your academic performance. It's a widely used indicator by educational institutions to assess a student's overall academic standing. A higher GPA generally reflects better academic achievement and can be crucial for scholarships, graduate school admissions, and certain career opportunities.
How GPA is Calculated
The calculation of GPA involves assigning a numerical value (grade points) to each letter grade you receive, and then weighting these points by the credit hours of each course. The most common standard grade point system in the United States is:
Course 3 (Introduction to Psychology): Grade C (2.0 points), 3 Credit Hours
Here's how the GPA would be calculated:
Step 1: Calculate Grade Points × Credit Hours for each course:
Course 1: 4.0 (A) × 3 credits = 12.0
Course 2: 3.3 (B+) × 4 credits = 13.2
Course 3: 2.0 (C) × 3 credits = 6.0
Step 2: Sum the total weighted grade points:
12.0 + 13.2 + 6.0 = 31.2
Step 3: Sum the total credit hours:
3 + 4 + 3 = 10
Step 4: Divide the total weighted points by total credit hours to find the GPA:
GPA = 31.2 / 10 = 3.12
The student's GPA would be 3.12.
How to Use This Calculator
For each course you've taken, select your letter grade from the dropdown menu.
Enter the number of credit hours for that specific course.
If you have more courses than the initial fields provided, click the "Add Another Course" button to add more input rows.
If you make a mistake or no longer need a course row, click the "Remove" button next to it.
Once all your courses and credits are entered, click "Calculate GPA" to see your overall Grade Point Average.
var courseCount = 0; // Global counter for courses, used for unique IDs
// Grade point mapping for standard letter grades
var gradePoints = {
'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,
'F': 0.0
};
/**
* Adds a new row of input fields for a course grade and credits.
*/
function addCourseRow() {
courseCount++;
var container = document.getElementById('courseInputs');
var newRow = document.createElement('div');
newRow.id = 'courseRow' + courseCount;
newRow.style.marginBottom = '10px';
newRow.innerHTML = `
A
A-
B+
B
B-
C+
C
C-
D+
D
F
`;
container.appendChild(newRow);
}
/**
* Removes a course row from the calculator.
* @param {string} rowId The ID of the row to remove.
*/
function removeCourseRow(rowId) {
var rowToRemove = document.getElementById(rowId);
if (rowToRemove) {
rowToRemove.parentNode.removeChild(rowToRemove);
}
// Note: courseCount is not decremented to avoid ID conflicts if rows are added/removed out of order.
// The calculation loop will dynamically check for existing elements.
}
/**
* Calculates the GPA based on the entered course grades and credits.
*/
function calculateGPA() {
var totalGradePointsWeighted = 0;
var totalCredits = 0;
var validInputs = true;
var courseRowsExist = false;
// Iterate through potential course IDs up to the highest ever added
for (var i = 1; i <= courseCount; i++) {
var gradeSelect = document.getElementById('grade' + i);
var creditsInput = document.getElementById('credits' + i);
// Check if the course row still exists (it might have been removed)
if (!gradeSelect || !creditsInput) {
continue; // Skip if the row doesn't exist
}
courseRowsExist = true; // At least one course row is present
var grade = gradeSelect.value;
var credits = parseFloat(creditsInput.value);
if (isNaN(credits) || credits <= 0) {
document.getElementById('gpaResult').innerHTML = 'Please enter valid positive credit hours for all courses.';
validInputs = false;
break;
}
var points = gradePoints[grade];
if (typeof points === 'undefined') {
// This case should ideally not happen with dropdowns, but good for robustness
document.getElementById('gpaResult').innerHTML = 'Invalid grade selected for Course ' + i + '.';
validInputs = false;
break;
}
totalGradePointsWeighted += (points * credits);
totalCredits += credits;
}
if (!validInputs) {
return; // Stop if any input was invalid
}
if (!courseRowsExist) {
document.getElementById('gpaResult').innerHTML = 'Please add at least one course to calculate GPA.';
return;
}
if (totalCredits === 0) {
document.getElementById('gpaResult').innerHTML = 'Total credit hours cannot be zero. Please ensure all courses have positive credit hours.';
return;
}
var gpa = totalGradePointsWeighted / totalCredits;
document.getElementById('gpaResult').innerHTML = 'Your calculated GPA is: ' + gpa.toFixed(2) + '';
}
// Initialize the calculator with a few course rows on page load
window.onload = function() {
addCourseRow();
addCourseRow();
addCourseRow();
};