Free GPA & CGPA calculators built for real students

How GPA actually works

Grade Point Average — or GPA — is a single number that summarises how well you've done across your courses. Every letter grade you receive is mapped to a number, usually on a 4.0 scale where an A is worth 4.0 and an F is worth 0.0. To calculate your GPA, each course's grade point is multiplied by its credit hours, and the total is divided by the number of credit hours you took. The credit-hour weighting is what stops a one-credit elective from drowning out a four-credit core course.

That weighting is the part students most often forget. Two students could earn the same set of letter grades but end up with very different GPAs because their course loads were structured differently. When you use the calculator above, the credit-hour field is doing most of the work — getting it right is more important than fussing over the difference between an A and an A−.

The standard 4.0 grade points

Letter	Grade Points	Typical %
A / A+	4.00	93–100
A−	3.70	90–92
B+	3.30	87–89
B	3.00	83–86
B−	2.70	80–82
C+	2.30	77–79
C	2.00	73–76
D	1.00	60–69
F	0.00	Below 60

GPA, SGPA and CGPA — what's the difference?

The three terms are related but they answer different questions. GPA is the general label for any grade-point average. SGPA, or Semester Grade Point Average, is the GPA for a single term. CGPA, the Cumulative Grade Point Average, combines every semester you've completed so far. If you're in your second year and you want to know how your overall academic record looks to an employer or a graduate admissions committee, that's your CGPA. If you want to know how a single rough semester affected you, that's your SGPA.

Most South Asian universities — and a number of European ones — quote SGPA and CGPA on a 10-point scale rather than the 4-point scale common in the United States. The math behind both scales is the same; only the upper bound changes. If you need to move between the two, the SGPA to CGPA and Percentage to CGPA tools handle the conversions and explain the assumptions involved.

A worked example

Imagine a semester with four courses: a 4-credit Calculus course where you earned a B+, a 3-credit Literature course with an A−, a 3-credit Chemistry course with a B, and a 1-credit lab with an A. Multiply each grade point by its credits, add them up, and divide by the total of 11 credit hours:

(3.3 × 4) + (3.7 × 3) + (3.0 × 3) + (4.0 × 1) = 13.2 + 11.1 + 9.0 + 4.0 = 37.3
37.3 ÷ 11 = 3.39 GPA.

Notice that the one-credit lab — even with a perfect score — barely moves the average. That's the credit-hour weighting at work.

Common mistakes worth avoiding

• Mixing scales. Don't drop a 10-point SGPA into a 4-point CGPA calculation without converting first. The number will look reasonable but it won't mean anything.
• Ignoring failed courses. A failed course usually still counts toward credit hours attempted, even though it contributes zero grade points. That's why a single F is so painful.
• Forgetting pass/fail courses. Courses graded as pass/fail are usually excluded from GPA entirely. Don't include them in the calculator.
• Rounding too early. Round at the end, not at each step. Rounding mid-calculation can shift your final GPA by a few hundredths.