SGPA to CGPA calculator

Converting SGPAs to a CGPA means taking their credit-weighted average: each semester’s SGPA multiplied by that semester’s credits, summed, then divided by total credits. There is a well-known shortcut — just average the SGPA numbers — and it is exactly correct in one situation and quietly wrong in every other.

The shortcut is exact when every semester carries identical credits. Weighting a set of equal weights changes nothing, so the plain average and the weighted average agree to the last decimal. Some universities do run uniform credit loads across all semesters, and if yours is one of them you can average freely.

Where credits vary, the shortcut drifts in a predictable direction: it flatters whichever semesters were lightest. Four semesters of 7.80, 8.10, 8.60 and 8.40 carrying 22, 24, 25 and 23 credits average to 8.225 unweighted, but weight to 8.2362 — small here, and larger the more your credit loads diverge. A single 30-credit project semester at a low grade can move the true figure by half a point below the average you calculated.

A partial degree is fine to compute. CGPA at the end of semester four is a real number that placement portals and scholarship forms ask for constantly; it simply covers four semesters instead of eight. What you cannot do is mix a completed semester with an in-progress one — a semester with no result yet has no SGPA and no credits earned, so it stays out.

If you have subject grades rather than semester averages, compute each semester with the SGPA calculator first. Once the CGPA is settled, CGPA to percentage converts it for a form that will not take grade points.