GPA Calculator

What This GPA Calculator Does

Grade Point Average condenses your performance across many courses into a single number on a common scale, which is why students, schools, and employers rely on it to assess academic standing at a glance. This calculator takes the grade and credit hours for each of your courses and returns your credit-weighted GPA along with the totals behind it. Add a row for every course, choose a letter grade, set the credit hours, and the result updates immediately so you can see exactly how each class moves the average.

How GPA Is Calculated

GPA is a weighted average rather than a simple mean of your letter grades. The calculation has three steps. First, each letter grade is converted to grade points on the 4.0 scale. Second, each course's grade points are multiplied by its credit hours to produce quality points. Third, all the quality points are added together and divided by the total number of credit hours. The formula is GPA = (sum of grade points times credit hours) divided by total credit hours.

A Worked Example

Imagine a semester with four courses: an A (4.0) in a 3-credit class, a B (3.0) in a 4-credit class, an A- (3.7) in a 3-credit class, and a C+ (2.3) in a 2-credit class. Multiply each grade by its credits to get the quality points: 12.0, 12.0, 11.1, and 4.6. Those sum to 39.7 quality points across 12 total credit hours. Dividing 39.7 by 12 gives a GPA of about 3.31. Notice that the B in the 4-credit course weighs on the result more than the C+ in the 2-credit course, even though C+ is the lower grade.

The 4.0 Scale

The standard US scale runs from 0.0 for an F up to 4.0 for an A. Most colleges use plus and minus grades that sit between the whole numbers, giving a finer picture of performance:

• 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 vary this slightly — a handful award a 4.0-capped A+, and others skip certain minus grades — so it is worth confirming the exact point values your school uses if your official transcript does not match.

Why Credit Hours Matter

Not all courses count equally toward your GPA, and this is the single most misunderstood part of the calculation. A 4-credit course exerts roughly four times the pull of a 1-credit course on your average. That is why the calculator asks for credit hours alongside each grade: a strong grade in a heavy course can offset a weaker grade in a lighter one, and the reverse is also true. Treating every course as equal would distort the result, which is exactly the mistake a plain average of letter grades makes.

Weighted vs. Unweighted GPA

This calculator computes an unweighted GPA, meaning every course is scored on the same 4.0 scale regardless of difficulty. Many high schools also report a weighted GPA that grants bonus points for more demanding courses, so an A in an AP, IB, or honors class might count as 5.0 instead of 4.0. As a result, weighted GPAs can rise above 4.0. Admissions offices frequently consider both numbers together with the rigor of the courses you took, so neither figure tells the whole story on its own.

Cumulative GPA and Planning Ahead

To find a cumulative GPA across several semesters, combine every course you want to include and divide total quality points by total credit hours, just as you would for one term. Averaging each semester's GPA only works if the semesters carried identical credit loads, because terms with more credits should count for more. You can also use the tool to plan: enter your completed courses to see where you stand, then add hypothetical future courses to test what grades you would need to reach a target GPA or hold a scholarship requirement.

Common Mistakes to Avoid

• Averaging letter grades directly instead of weighting them by credit hours.
• Including pass/fail courses, which usually grant credit but are commonly excluded from the GPA itself.
• Assuming every school uses the same point values; minor scale differences can shift your GPA by a few hundredths.