How SGPA is calculated
SGPA is a credit-weighted average for one semester. Each course contributes its grade points multiplied by its credit hours — those are “credit points” — and SGPA is total credit points divided by total credits.
A 4-credit course moves your SGPA twice as much as a 2-credit course. A plain average of grade points would be wrong whenever courses carry different credits.
Worked example (UGC's own)
Six courses, credits 3, 4, 3, 3, 3, 4; grade points 8, 7, 6, 10, 5, 6. Credit points: 24 + 28 + 18 + 30 + 15 + 24 = 139. Credits = 20. SGPA = 139 ÷ 20 = 6.95.
Which scale should you use?
Your institution's own. The UGC 10-point scale (O=10, A+=9, A=8, B+=7, B=6, C=5, P=4, F=0) is the most common in India, but the letters and values differ elsewhere: VTU uses S/A/B/C/D/E/F with E=4 as a pass grade; Anna uses O/A+/A/B+/B/C/RA; GTU uses AA/AB/BB/BC/CC/CD/DD/EE/FF with EE=3; Mumbai University has used both E=5/P=4 and O…D=4 schemes across faculties and eras. Pick your system in the calculator — never assume one scale fits all.
Failed courses, non-credit courses, and retakes
Under UGC rules, an F counts as 0 grade points and its credits stay in the denominator. Anna excludes RA/U courses from GPA entirely. Mumbai University counts a failed course once, and when later passed, only the new grade figures. Use the per-course Count checkbox to match your rules: uncheck a course your system excludes.
SGPA to percentage
There is no universal conversion. Apply your institution's own formula — for example, Anna ×10, VTU (SGPA−0.75)×10. Use the CGPA to Percentage Calculator with your university's preset.
Common mistakes
- Averaging grade points without credits. A 10 in a 2-credit course and a 6 in a 4-credit course average to 7.33 credit-weighted, not 8.00.
- Using the wrong scale. A “B” is 6 on the UGC scale but 8 on the VTU scale. Letters don't travel across systems.
- Deriving grade points from raw marks with a generic table. Marks-to-grade bands are set by each institution — and some use relative grading.
- Counting a failed course the wrong way. UGC counts F as 0; Anna excludes RA. Know your system.
Full walkthrough: How to Calculate SGPA. For your whole program: CGPA Calculator and How to Calculate CGPA.