<p>I’ve never been allowed to use a calculator for any of my math classes (Saddleback/SMC) and from what one of my professors told me, she never used a calculator until she entered grad school. As far as Math/Econ, like UCeric said, the major is more math than it is econ and upper division math tends to be mostly abstract/theory/proof based math rather than straight calculations like presented in Calculus. Linear Algebra is a good class that starts to touch on the direction where higher level math is going.</p>