Granite? Budget $40-50/SF for template, install, sink and basic level. I have seen places advertise $29-35/SF but ended up right at that $40-50 each time.
Depends on the city And state but typically between $25-40/sq ft.
@Raymond Hill I think the quotes above me for granite are aggressive. I've heard of guys paying $35/ sq ft but that was with an established relationship. For granite I would budget for $45-50/ sq ft.
Granite counters will run you 45-65/sq ft on RI. The range is for selected bevel options and selected stone. Big box stores can be a great options with lower end prices as they provide a great guarantee. I have gotten 10 year warranties in the past.