What this calculator does
Add your courses, pick a letter grade for each, enter how many credit hours the course is worth, and the calculator returns your weighted GPA on the standard 4.0 scale. The math runs instantly as you type, no submit button. Add as many rows as you need; remove ones you typed wrong.
The GPA is credit-weighted, which is the part most “quick GPA” calculators get wrong. A B+ in a 4-credit chemistry class moves your GPA more than an A in a 1-credit gym class, because the chemistry class is worth more academic weight. The calculator multiplies each grade’s points by its credits, sums everything, and divides by total credits to give you the actual number your transcript will show.
How the 4.0 scale maps
The US standard scale runs from 0.0 (F) to 4.0 (A). Each letter grade maps to a specific point value:
- A or A+: 4.0 (some schools weight A+ at 4.3, check yours)
- 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
What the calculator doesn’t do: weighted GPAs from honors or AP coursework (where some schools use a 5.0 scale), or international scales (UK, Indian, German systems use entirely different mappings). For those you’d need a school-specific calculator that knows your local conventions.
When credit weighting matters
Credit weighting is why pre-meds obsess over which courses to take. A 4-credit organic chemistry class with a B drags your GPA more than three 3-credit electives with A’s would lift it. A semester of 18 credit hours has 50% more impact on your cumulative GPA than a 12-credit semester. If you’re trying to repair your GPA after a rough semester, credits matter, taking a heavier load with consistent A’s is mathematically faster than coasting with a light load.
The calculator’s “quality points” line shows the weighted total before division. Some schools call these “honor points” or “grade points.” Multiply each course’s grade-point value by its credits, sum them, divide by credits taken, and you have GPA.
What “good” looks like
Different programs care about different thresholds:
- 3.5+ : Dean’s List eligibility at most schools, competitive for graduate programs
- 3.0-3.5: solid undergraduate standing, fine for most graduate admissions
- 2.0-3.0: meets academic minimums but limits graduate-school options
- Below 2.0: most programs put you on academic probation
Medical school admissions usually want 3.7+ overall and 3.7+ in science prerequisites. Top-10 law schools median around 3.85. PhD programs vary wildly by field.
Frequently asked questions
Why does my computed GPA differ from my official transcript? Schools sometimes drop the lowest grade for repeated courses (grade replacement) or weight honors/AP courses on a 5.0 scale. This calculator uses straight unweighted credit-hour math. For your official GPA, check your school’s registrar or student portal.
What if I’m in a system that uses percentages instead of letters? Convert percentages to letters first, 90+ is usually A, 80-89 is B, 70-79 is C, etc. Schools publish their own mappings; ask the registrar for the exact one if it matters.
How do withdrawals (W) and incompletes (I) factor in? They don’t, in this calculator. W’s and I’s typically don’t count toward GPA at all, they show on the transcript but carry zero credits and zero grade points. Just leave those courses off the list.
Can I project my GPA after next semester? Yes, add hypothetical courses with the grades you expect to earn. The calculator shows what your overall GPA would be if you actually got those grades. Enter your existing courses with their actual grades and credits first, then add your in-progress courses with target grades.