Weighting matters
- Input
- A (3cr), B (4cr), C (3cr)
- Output
- GPA 3.0
Weighted and unweighted agree here because the credits are balanced. Change to A (1cr), B (4cr), C (5cr) and the weighted GPA drops to 2.6.
GPA Calculator
A GPA calculator converts letter grades into a single credit-weighted figure. The weighting is the part that is routinely got wrong: averaging the grade points directly ignores that a four-credit course counts more than a one-credit one, and inflates the result whenever the weaker grades are in the heavier courses. Both the 4.0 and 10-point scales are supported, since they are different systems rather than one converted into the other.
Runs entirely in your browser — your figures are never uploaded.
How is GPA calculated?
GPA is the sum of each grade's points multiplied by its credits, divided by total credits. Three courses worth 3, 4 and 3 credits graded A, B and C give (12 + 12 + 6) ÷ 10 = 3.0. Averaging grades without weighting by credits gives the wrong answer.
CourseCreditsGrade
Grade point average
3.91
out of 4 · 10 credits across 3 courses
- Total credits
- 10
- Weighted points
- 39.1
- Unweighted average
- 3.90
Ignores credits — shown for comparison
Reach a target GPA
You need an average of 3.36 across the remaining 30 credits.
The maths
GPA Calculator formula
Formula
GPA = Σ(grade points × credits) / Σ(credits)
- grade points
- Numeric value of the letter grade on the chosen scale
- credits
- Credit hours or weight carried by the course
Worked example
Three courses on the 4.0 scale
Inputs
- Course A
- 3 credits, grade A (4.0)
- Course B
- 4 credits, grade B (3.0)
- Course C
- 3 credits, grade C (2.0)
Working
- Weighted points: 4.0 × 3 = 12, 3.0 × 4 = 12, 2.0 × 3 = 6
- Total points = 30
- Total credits = 3 + 4 + 3 = 10
- GPA = 30 ÷ 10
GPA 3.0. A plain average of 4.0, 3.0 and 2.0 also gives 3.0 here — but change the credits to 1, 4 and 5 and the weighted GPA falls to 2.6 while the plain average stays at 3.0.
How to
How to use the GPA Calculator
- 1
Choose your scale
Pick the 4.0 letter scale used across the US or the 10-point scale used by most Indian universities. The grade options change accordingly.
- 2
Add your courses
Enter each course with its credit hours and the grade received. Credits are usually on your transcript or in the course catalogue.
- 3
Read the weighted GPA
The result weights each grade by its credits. Courses with more credits move the figure more, which is how institutions calculate it.
- 4
Set a target
Enter a GPA you want and the credits remaining to see the average you need. If it exceeds the scale maximum, it is flagged as unreachable.
Reference
Grade point values by scale
| Grade | 4.0 scale | 10-point scale | Typical percentage |
|---|---|---|---|
| A / O | 4.0 | 10 | 90–100 |
| A− / A+ | 3.7 | 9 | 80–89 |
| B+ / A | 3.3 | 8 | 70–79 |
| B / B+ | 3.0 | 7 | 60–69 |
| C / B | 2.0 | 6 | 50–59 |
| D / P | 1.0 | 4 | 40–49 |
| F | 0.0 | 0 | below 40 |
Examples
GPA Calculator examples
Reaching a target
- Input
- 3.0 over 60 credits, target 3.5, 30 credits left
- Output
- Need a 4.5 average — impossible
The required average exceeds the 4.0 maximum, so the target cannot be reached. Knowing this early is more useful than a number that looks achievable.
10-point scale
- Input
- O (4cr), A+ (3cr), B+ (3cr)
- Output
- GPA 8.8
On the Indian 10-point scale, O is 10, A+ is 9 and B+ is 7. Weighted: (40 + 27 + 21) ÷ 10 = 8.8.
Why use it
What the GPA Calculator gives you
Correct weighting
Credits are applied properly, so a heavy course counts more — matching how your institution computes the figure on your transcript.
Two real scales
The 4.0 and 10-point systems are offered as separate scales rather than converting one into the other, which loses accuracy.
Honest target checking
If a target cannot be reached even with perfect grades, that is stated plainly instead of returning an impossible required average.
Nothing stored
Grades and courses stay in your browser.
Good to know
GPA Calculator limitations
- Institutions vary. Some use plus and minus grades, some do not, and some cap or round differently — always check your own handbook.
- Pass or fail courses usually carry credits but no grade points and are excluded from GPA at most institutions.
- Repeated courses are handled differently everywhere: some replace the original grade, some average both, some count only the latest attempt.
- Weighted GPA for honours or advanced courses, common in US high schools, uses a different scale that goes above 4.0.
Summary
GPA Calculator in short
- GPA = Σ(grade points × credits) ÷ Σ(credits).
- Averaging grades without credit weighting gives a wrong figure.
- The 4.0 and 10-point systems are separate scales, not conversions.
- A target requiring more than the scale maximum is unreachable.
- Institution rules on retakes and pass/fail vary widely.
FAQ
GPA Calculator questions
How do I calculate my GPA?
Multiply each course's grade points by its credit hours, add those products, then divide by total credits. Grades A, B and C in 3, 4 and 3 credit courses give (12 + 12 + 6) ÷ 10 = 3.0.
Why weight by credits?
Because courses are not equal. A four-credit course represents twice the work of a two-credit one and counts twice as much. Averaging grade points directly overstates your GPA whenever the weaker grades are in heavier courses.
What is the difference between the 4.0 and 10-point scales?
They are separate systems. The 4.0 scale maps letter grades from A to F onto 0–4 with plus and minus steps of 0.3. The 10-point scale, used across Indian universities, maps grades onto 0–10. Neither converts cleanly to the other.
How do I work out the grades I need?
Multiply your target GPA by total credits including those remaining, subtract the points you already have, and divide by the remaining credits. If the answer exceeds the scale maximum, the target cannot be reached.
Do pass or fail courses count?
At most institutions they carry credit toward graduation but are excluded from GPA, because there is no grade point to weight. Check your handbook, since a minority do include them.
How does retaking a course affect GPA?
It depends entirely on the institution. Some replace the original grade, some average the two attempts, and some count both separately. This changes the result substantially, so confirm the local rule.
What is the difference between semester and cumulative GPA?
Semester GPA covers one term's courses; cumulative GPA covers everything to date, weighted by the credits in each term. A strong single semester moves the cumulative figure less than students expect.
What counts as a good GPA?
Context decides. On a 4.0 scale, 3.5 and above is generally considered strong and 3.0 solid, but competitive graduate programmes and employers vary widely in what they look for.
Are my grades saved?
No. Everything is calculated in your browser and nothing is transmitted. Closing the tab discards the courses you entered — there is no account and no record.
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