How to calculate the amount of memory occupied by the variable in Pascal?

I need to calculate the amount of memory that any variable takes. Thanx for any input.

EDITED: I didn't notice that I need to开发者_Python百科 calculate it manually (by hand). Thanx

SizeOf(variable)

of course that only goes for the variable not to any additional memory the variable might point to, or any alignment if it is part of a structured type.