A quiet GPA calculator for serious students.

1. Pick your grading scale. The default is the US 4.0 scale used by most American colleges and high schools, but you can switch to UK Honours, NUST, IB, or any of the other supported scales from the dropdown.
2. Add your courses. For each class, enter the grade you received and the number of credit hours. Course names are optional — they help you keep track but don’t affect the math.
3. Read your GPA. The result updates as you type. To plan ahead, switch to the Target tab and enter the GPA you want at graduation; Summa tells you the average you need over your remaining credits.

Your entries are saved in your browser’s local storage, so they’ll still be here when you come back tomorrow. Nothing is uploaded.

GPA — Grade Point Average — is a single number that summarises a student’s academic performance. The trick is that it’s not just an average of grades. It’s a weighted average, where each course’s grade contributes proportionally to its credit hours. A four-credit organic chemistry course pulls more weight than a one-credit gym elective, even if the letter grade is identical.

The standard US 4.0 scale assigns grade points like this: A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0. Plus and minus modifiers shift the points by 0.3 or 0.4 in either direction (so A− = 3.7, B+ = 3.3, and so on). Other countries do it differently — Germany inverts the scale so that 1.0 is the best grade, India uses a 10-point CGPA, and the UK uses honours classifications instead of a numeric GPA at all.

GPA matters because admissions committees, scholarship reviewers, and early-career employers all use it as a shorthand for academic consistency. Other things matter more in the long run — the work you actually produce, your network, the recommendations you earn — but for the first few gates after high school, GPA is what opens them.

The formula is straightforward. For each course, multiply the grade points by the credit hours to get quality points. Sum the quality points across every course, sum the credit hours, and divide:

GPA = Σ(grade points × credit hours) ÷ Σ(credit hours)

Worked example

A student takes four courses in one semester:

• Calculus II — A (4.0) × 4 credits = 16.0 quality points
• English Literature — B+ (3.3) × 3 credits = 9.9 quality points
• Microeconomics — A− (3.7) × 3 credits = 11.1 quality points
• Studio Art — B (3.0) × 2 credits = 6.0 quality points

Total quality points = 16.0 + 9.9 + 11.1 + 6.0 = 43.0. Total credit hours = 4 + 3 + 3 + 2 = 12. Semester GPA = 43.0 ÷ 12 = 3.58.

Cumulative GPA uses the same formula, but you sum quality points and credits across every semester you’ve completed — not just the current one.

The honest answer: it depends on what you’re aiming for. A GPA that’s excellent for one path is unremarkable for another. Here’s a rough map of how GPA tends to be read in different contexts on the US 4.0 scale.

High school

Many US high schools weight Honors, AP, and IB courses, so GPAs above 4.0 are common on transcripts. Selective universities typically expect a weighted GPA above 3.8 and an unweighted GPA above 3.5. Below 3.0 starts to limit options for traditional four-year admission, though community college and transfer paths are wide open and well-trodden.

Undergraduate

2.0 is the floor for academic good standing at most universities; below that, you risk probation. 3.0 is solid. 3.5 begins to matter for competitive scholarships and study-abroad programmes. 3.7 and above is the range graduate admissions committees notice — though for top PhD programmes, GPA is necessary but never sufficient.

Graduate school admissions

Master’s programmes vary widely; many accept students with GPAs in the 3.0–3.5 range. PhD programmes in competitive fields routinely admit candidates with 3.7+ undergraduate GPAs, but research experience and recommendation letters carry equal or greater weight.

Employers

A handful of employers — investment banks, consulting firms, federal agencies — screen for GPA above 3.5 in early career applications. Most don’t. Two years out of school, GPA almost never appears on a CV, and almost no one asks.

A good GPA is the lowest one that doesn’t close the doors you want open. Optimising past that has diminishing returns.