If you need a calculator for your exam, it will be listed in the Exam Timetable.

Face to Face Exam 
If you're sitting a face to face exam you must get an approved calculator sticker from Student Central or the Secondhand bookshop. If your calculator does not have a UWA Approved sticker, it will be confiscated from you and returned after the exam. You can have your calculator approved well in advance of the exam week.