GradeCalc

College GPA Calculator

Enter your courses with their credit hours. We weight by credits the way your registrar does, and show what each course is actually costing you.

College GPA by credit hours

Quarter credits convert to semester credits at ×0.667. That is a constant, so it cancels out of the average — your GPA does not change, only the credit count does.

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Your semester GPA3.41

unweighted · 14 graded credits · 1 pass/fail course excluded

Graded credits 14
Quality points 47.8
Scale 4.0 scale

Quality points
47.8
Graded credits
14
Excluded from the GPA
1 course(s)
GPA
3.41

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Credit hours are the whole story at college level

High school GPA is usually a straight average across courses that all count the same. College GPA is not. A four-credit course carries four times the weight of a one-credit lab, and once you have a schedule with 1-, 3- and 4-credit courses in it, that asymmetry decides most of your result.

The practical version: your credit-heavy courses are the ones worth protecting. A one-credit elective is nearly noise.

Semester credits and quarter credits are not the same unit

Institutions on a quarter system run three shorter terms a year instead of two longer ones, and their credit hours are correspondingly smaller. The standard conversion is 1 semester credit = 1.5 quarter credits, so a 5-credit quarter course is roughly a 3.33-credit semester course. Mixing the two units in one calculation without converting will silently distort your GPA, and the error is easy to miss because the number still looks plausible. Pick a system in the calculator and stay in it.

Worked example

A 15-credit semester, one course of which is pass/fail:

  • Organic Chemistry — B− (2.7) × 4 credits = 10.8
  • Organic Chemistry Lab — A (4.0) × 1 credit = 4.0
  • Statistics — B+ (3.3) × 3 credits = 9.9
  • Political Science — A− (3.7) × 3 credits = 11.1
  • Technical Writing — A (4.0) × 3 credits = 12.0
  • Physical Education — P, excluded entirely

Total: 47.8 grade points ÷ 14 graded credits = 3.30.

Now look at what each course did. The A in the one-credit lab lifted the GPA by about 0.04. The B− in the four-credit chemistry course pulled it down by about 0.21 — more than five times as much. Same student, same term, and the two courses are not remotely comparable in what they cost. This is the argument for putting your revision hours where the credits are.

Academic standing thresholds

Institutions commonly set good standing at a 2.0 cumulative GPA, academic probation below it, and the Dean's List at 3.5 for a full-time term — often with a minimum credit load attached, typically 12 credits. Those are the usual figures across US institutions. They are not your institution's figures until you have read your institution's catalogue, and schools do vary: some set the Dean's List at 3.25, some at 3.7, some require no incompletes on the record.

The formula

GPA = Σ(pᵢ × cᵢ) ÷ Σcᵢ across graded courses only. Pass/fail, withdrawals, incompletes and audits are excluded from both the numerator and the denominator — they are not zeroes, they are simply not in the average.

Where this stops being reliable

Repeat policies vary more than anything else in this space: grade replacement, grade averaging, and "both attempts on the transcript but only the second counts" all exist, and they produce different GPAs from the same two attempts. Study-abroad and transfer credits often arrive with credit hours but no grade points, changing your credit total without touching your GPA. Non-credit and audit courses do nothing at all. And a few institutions compute cumulative GPA over attempted rather than earned credits, which changes what a withdrawal costs you.

Your registrar's rules beat this page every time. Use this to plan; use your transcript to know.

Common questions

How do credit hours affect my GPA?

They set how much each course counts. Grade points are multiplied by credits before averaging, so a 4-credit course influences your GPA four times as much as a 1-credit one. In a typical 15-credit semester, an A in a 1-credit lab moves your GPA by about 0.04 while a B− in a 4-credit course moves it by about 0.21.

What GPA do I need for the Dean's List?

Commonly 3.5 for a full-time term, often with a minimum of 12 credits and no incomplete grades. That is the usual convention rather than a rule — some institutions set it at 3.25 and some at 3.7. Your academic catalogue is the authority.

How does retaking a course affect my GPA?

It depends on your institution's repeat policy, and the three common ones give different answers. Grade replacement removes the original from the GPA calculation. Grade averaging counts both attempts. A third variant leaves both on the transcript but counts only the most recent. Check your catalogue before assuming a retake erases anything.

Do lab courses count toward GPA?

Yes, if they carry credit and a letter grade — usually 1 credit, so they count but lightly. A lab graded pass/fail is excluded entirely, the same as any other pass/fail course.

How do I convert quarter credits to semester credits?

Multiply quarter credits by two-thirds. A 5-credit quarter course is about 3.33 semester credits. Do the conversion before mixing courses from both systems in one calculation, or your GPA will come out wrong in a way that still looks reasonable.

How do I calculate GPA for just one semester versus overall?

This page gives you the single term. To fold it into your overall figure you need your prior GPA and prior credit total — the cumulative GPA calculator does that, and it also solves the reverse: what next term has to be to reach a target.

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