How to Calculate Your GPA (4.0 and 10-Point Scales)

Your GPA — grade point average — is the single number that condenses years of coursework into one comparable figure. Universities use it to rank applicants, employers glance at it, and scholarships hinge on it. Yet its definition is often muddier than it should be, especially across the different grading scales in use around the world.

The concept is simple once you see it: GPA is a weighted average of your grades, where the "weights" are your course credits. A high-credit course moves your GPA more than a low-credit one. That weighting is the whole game — it's why a perfect grade in a 4-credit subject matters more than in a 1-credit elective.

The formula

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

Concretely: for each course, multiply its grade points by its credit hours. Add all those products together (that's the numerator, the Σ), divide by the total credit hours (the denominator). The result is your GPA.

Grade points (US 4.0 scale)

Grades map to points on the familiar 4.0 scale:

Grade	Points	Grade	Points
A+ / A / O	4.0	C+	2.3
A-	3.7	C	2.0
B+	3.3	C-	1.7
B	3.0	D	1.0
B-	2.7	F	0

Some schools add plus/minus points and some don't; this chart reflects one common scheme. If your institution doesn't use plus/minus, the whole-letter values (A=4.0, B=3.0, C=2.0 and so on) still work the same way.

Worked example

Suppose you take four courses, each worth 3 credits, and earn A, B+, A-, and B:

Points  = (4.0×3) + (3.3×3) + (3.7×3) + (3.0×3) = 42.0
Credits = 3 + 3 + 3 + 3 = 12
GPA     = 42.0 ÷ 12 = 3.5

A GPA of 3.5 on the 4.0 scale — strong, above average. Now imagine a 1-credit elective dragging that down: swap one 3-credit A for a 1-credit A and the numbers shift noticeably, which is exactly the weighting effect.

Indian 10-point scale (CGPA)

Many Indian universities use a 10-point scale, where the point values run higher:

O = 10, A+ = 9, A = 8, B+ = 7, and so on

The calculation procedure is identical — multiply a course's point value by its credits, sum, divide by total credits — just with different point numbers. A common (though not universal) shortcut converts CGPA to a percentage as CGPA × 9.5, but conversion rules vary by university, so always check your own institution's formula.

GPA vs CGPA

The two terms are often mixed up:

• GPA — typically your average for a single term or semester.
• CGPA — your cumulative average across all terms to date.

Both use the same weighted-average formula. CGPA is just the running total that keeps accumulating as you complete more semesters, so it's usually the number on your transcript.

Tips for managing your GPA

• High-credit courses move your GPA most — both up and down, so prioritise them.
• Set non-credit courses to 0 credits — audit classes, labs without grading and some electives shouldn't pull the average.
• Retaking a failed course often replaces or averages the grade, and can lift your GPA significantly where the policy allows it.

Key takeaways

• GPA is a credit-weighted average: sum of (grade points × credits) ÷ total credits.
• The 4.0 and 10-point scales use the same procedure with different point values.
• GPA is usually one term; CGPA is the cumulative average.
• Prioritise high-credit courses and exclude non-credit ones.

FAQ

What is a good GPA? It depends on context: on a 4.0 scale, 3.5+ is generally strong, and many competitive programs look for 3.7+. On a 10-point CGPA, common strong thresholds sit around 8+. Check the expectations of the program or employer you're targeting.

How is CGPA converted to percentage? A widely used shortcut is CGPA × 9.5, but conversion rules vary by university and board. Always use your institution's official table.

Do elective and non-credit courses count? Only credit-bearing courses should affect the weighted average. Audit and non-credit courses are usually excluded by setting credits to zero.

Why does a high-credit A matter more than a low-credit A? Because GPA is weighted by credits. A perfect grade in a 4-credit course adds more weight to the average than the same grade in a 1-credit course.

Calculate yours instantly with the GPA Calculator, and see where you stand within a distribution with the Z-Score Calculator.