CBSE Optional Subject Impact Calculator

Model Best-of-5/4 with Additional subject replacement for CBSE X/XII.

CBSE Optional Subject Impact Calculator

See how marking a subject as Additional/Optional can replace a lower score in Best-of-5 or Best-of-4.

For Class XII, many aggregates consider 5 subjects. Some college admissions use Best of 4; always check college-specific criteria.
Without Optional Replacement
Best of 5: 79.60%
  • English
    88%
  • Physics
    84%
  • Chemistry
    79%
  • Physical Education
    75%
  • Mathematics
    72%
Best of 4: 81.50%
With Optional Considered
Best of 5: 83.40%
  • Computer Science
    Optional
    91%
  • English
    88%
  • Physics
    84%
  • Chemistry
    79%
  • Physical Education
    75%
Best of 4: 85.50%
Replacement Summary
Best of 5
  • Added: Computer Science (91%)
  • Replaced: Mathematics (72%)
Best of 4
  • Added: Computer Science (91%)
  • Replaced: Physical Education (75%)
This tool models typical CBSE handling where an Additional subject may replace a lower score in aggregates. Always verify with official CBSE circulars and college-specific rules.

Notes & Disclaimers

  • CBSE Class X: Board doesn’t declare a percentage. Best-of-5 here is informational.
  • CBSE Class XII: Many aggregates use 5 subjects; some college admissions use Best of 4 with specified subject lists.
  • Always verify with CBSE circulars and college-specific admission policies.