How big a microwave do I actually need?

For a single person or small apartment, 0.7 to 0.9 cu. ft. fits most needs and saves counter space. For families or anyone who wants to fit a dinner plate or a 9x13 dish, 1.2 to 1.6 cu. ft. is the sweet spot most expert reviewers recommend. Anything above 2.0 cu. ft. is for people who actually use convection and air-fry modes regularly, or who need to fit large casserole dishes.