Free Tools for
O-Level Students
Practical calculators and references built for Singapore secondary school students. No sign-up, no ads — just useful tools.
O-Level Grade Calculator
Enter your raw marks and instantly see your predicted grade from A1 to F9. Also calculates your L1R4 and L1R5 aggregate scores for JC and Polytechnic admission.
Open calculatorShould I Take A-Math?
5 quick questions about your E-Math grade, interests, and available study time. Get a personalised recommendation: take A-Math, stick with E-Math, or consult a tutor.
Take the quizFormula Reference
Complete O-Level formula sheet covering algebra, geometry, trigonometry, calculus, statistics, and more. Filter by subject and search by keyword. Bookmark for revision.
Browse formulasTools help — but a tutor makes the difference.
Mr. Gan works with students who need to move from borderline passes to distinctions, systematically and without guesswork.
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