Your weighted GPA across 3 courses

What This GPA Calculator Does and Who It's For

This GPA calculator converts your course grades into a single weighted grade point average on the standard 4.0 scale. It is built for high school and college students who want to check their standing before report cards post, applicants estimating GPA for college or scholarship applications, and anyone setting a target grade for the current term.

Because it is weighted by credit hours, the result reflects the real impact of each class. A 4-credit science course counts more toward your average than a 1-credit elective, exactly as your registrar calculates it.

How the GPA Formula Works

GPA is a credit-weighted average of grade points. The formula is:

GPA = sum(grade points x credits) / sum(credits)

First, each letter grade is converted to grade points on the 4.0 scale. Multiply each course's grade points by its credit hours to get quality points, add up all the quality points, then divide by the total credits attempted. A common conversion is: 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 = 1.0, F = 0.0.

Worked Example with Real Numbers

Suppose a student takes four courses in one semester:

• Biology - grade A (4.0), 4 credits -> 16.0 quality points
• Calculus - grade B+ (3.3), 3 credits -> 9.9 quality points
• English - grade B (3.0), 3 credits -> 9.0 quality points
• Art - grade A- (3.7), 2 credits -> 7.4 quality points

Finishing the Calculation

Add the quality points: 16.0 + 9.9 + 9.0 + 7.4 = 42.3. Add the credits: 4 + 3 + 3 + 2 = 12.

Divide: 42.3 / 12 = 3.525, which rounds to a 3.53 GPA. Notice the math: the same grades with equal weighting would give a slightly different number, which is why entering accurate credit hours matters.

Tips and Common Mistakes

Small input errors change the result more than people expect. Keep these points in mind:

• Use your school's exact grade-point values; some schools do not award A+ above 4.0, and others use a 4.3 or 4.5 weighted scale for honors and AP classes.
• Enter credit hours, not the number of classes. A lab and a lecture often carry different credit weights.
• Decide how to treat retakes, pass/fail, and withdrawals. Many schools exclude P/F courses from GPA entirely.
• Cumulative GPA spans all terms, so a single strong semester moves it less as your total credits grow.

Factors That Affect Your GPA

Two things drive the final number: the grade points themselves and how many credits each grade applies to. High-credit courses dominate the average, so a strong grade in a 4-credit class outweighs the same grade in a 1-credit one.

If you are aiming for a target GPA, this calculator also helps you reverse-engineer it: enter your planned grades and credits for the term to see whether they lift your cumulative average to where you need it.