Home / Best calculators / Casio fx-991EX
Review · updated Oct 2026
Casio fx-991EX review: best scientific calculator for students
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Our take
Buy it if you need a scientific calculator for school or university. Skip it if your course requires a graphing model.
- Type
- Scientific
- Display
- Natural textbook
- Power
- Solar and battery
- Exams
- Allowed on many; check yours
Where to buy
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Who it is for
School, university and the desk.
The fx-991EX shows fractions and roots the way a textbook does, and puts statistics, matrices and equation solving a menu away. It does not graph, so if your course wants graphs, look at the TI-84 instead. Always check your exam rules before buying.
In three steps
- 01Set the mode to Math so answers show as fractions.
- 02Learn the three menus you will use: Table, Statistics and Equation.
- 03Check your exam board's approved list before the exam.
What works
- + Natural textbook display
- + Solar and battery power
- + Good value for what it does
What doesn’t
- – Does not graph
- – The menus take a little time to learn