Hello student ,
Calculators will not be allowed for JEE Main and advanced . The authorities have prohibited the use of calculators or any other electronic devices i n the exam centre .
Hope it helps !
No, you cannot use calculators in jee mains or jee advanced, you have to do all the calculations on your own. So you must practice to do the calculations from now onwards if you have been using calculators till now. By practicing daily you can increase your speed of calculating tough equations and also you will not face much problem on the exam day.