Marks to GPA Converter

US GPA (4.0 Scale)
2.30
Letter grade: C+
Percentage
78.0%
Marks
78 / 100
GPA
2.30 / 4.0

How to Convert Marks to GPA

Enter the marks you scored and the maximum possible marks for a course. The calculator converts your percentage score to a US 4.0 GPA using standard grade boundaries. Use the Batch tab to enter multiple subjects with different credit weights — ideal for semester-end GPA calculation when you have marks across many courses.

Marks to GPA Conversion Scale

First calculate: Percentage = (Marks ÷ Maximum Marks) × 100

93–100% → 4.0 (A)  |  90–92% → 3.7 (A-)  |  87–89% → 3.3 (B+)
83–86% → 3.0 (B)  |  80–82% → 2.7 (B-)  |  77–79% → 2.3 (C+)
73–76% → 2.0 (C)  |  70–72% → 1.7 (C-)  |  67–69% → 1.3 (D+)
63–66% → 1.0 (D)  |  60–62% → 0.7 (D-)  |  Below 60% → 0.0 (F)

This scale follows the most common US university grading standard. Note that some institutions use slightly different cut-offs (e.g., A starts at 90% instead of 93%). Always check your specific institution's grading policy.

Example Conversion

Student scored 78 out of 100:

Percentage = (78 ÷ 100) × 100 = 78%

78% falls in the 77–79% range → GPA: 2.3 (C+)

Student scored 46 out of 60 in a lab exam:

Percentage = (46 ÷ 60) × 100 = 76.67%

76.67% falls in the 73–76% range → GPA: 2.0 (C)

Batch Calculation Example

Engineering student, Semester 3:

Algorithms (85/100, 4 credits) → 3.0 GPA × 4 = 12.0 pts

Data Structures (92/100, 3 credits) → 3.7 GPA × 3 = 11.1 pts

Calculus II (74/100, 3 credits) → 1.7 GPA × 3 = 5.1 pts

Lab Work (48/60, 2 credits) → 2.3 GPA × 2 = 4.6 pts

Total: 32.8 pts ÷ 12 credits = GPA: 2.73 (B-)

Frequently Asked Questions

Using the standard US scale, a 3.0 GPA corresponds to a B grade, which requires 83–86% marks. Some universities start the B range at 80% (giving 3.0 at 80%), while others use 83%. This calculator uses 83% as the lower boundary for 3.0 GPA. Check your institution's specific grading policy for the exact threshold.
Yes. The calculator works with any maximum marks value. Enter your actual marks scored and the maximum possible (e.g., 38 out of 50, or 150 out of 200). The calculator first converts to a percentage, then maps that percentage to the corresponding GPA. This handles exams, assignments, and projects with any total mark value.
There are several reasons: your university may use a different percentage-to-GPA mapping; the grading may involve curves or scaling; some courses may be graded on a pass/fail basis; or your university may use plus/minus grading differently. This calculator provides a standard estimate. Your official transcript uses your institution's specific conversion, which may differ.
Use the Batch tab and enter the credit hours for each subject. The calculator multiplies each subject's GPA by its credits to get grade points, sums all grade points, then divides by total credits. This gives a credit-weighted average, which is the standard method used by US universities. A 4-credit course has twice the impact on your GPA as a 2-credit course.
Not necessarily. While 77–79% mapping to C+ (2.3 GPA) is the most common standard in the US, some universities define C+ as 75–79% or 78–81%. A few schools use a simpler scale without plus/minus grades. Always refer to your university's official grading scale, usually found in the course syllabus or academic catalog.

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