The size of a microwave oven that can accommodate a dinner plate depends on the diameter or dimensions of the dinner plate itself. Standard dinner plates typically range in size from 9 to 12 inches (23 to 30 centimeters) in diameter.
To ensure that your dinner plate fits comfortably inside a microwave, you'll want to consider both the internal dimensions of the microwave's cooking cavity and the turntable diameter. The turntable is the rotating plate inside the microwave that helps to ensure even cooking.
As a general guideline, a microwave oven with an internal capacity of around 0.9 to 1.2 cubic feet should be able to accommodate a standard-sized dinner plate. This is typically the case for most countertop microwave ovens available on the market. However, it's always a good idea to check the specifications or dimensions of the microwave you are considering to ensure it has adequate space for your dinner plate.
When shopping for a microwave, you can also look for models that explicitly mention their compatibility with dinner plates or have turntables with larger diameters. Some microwave ovens come with rectangular or square-shaped cooking cavities, which can provide more flexibility in accommodating larger plates or dishes.
If possible, it's recommended to measure your dinner plate's diameter or dimensions and compare them to the internal dimensions or turntable diameter of the microwave you intend to purchase. This way, you can be confident that the microwave will comfortably fit your dinner plate.