The number of chickens that can be cooked in an oven at once depends on the size of the oven, the size of the chickens, and the type of cooking vessel used.
In a standard home oven, you can typically cook multiple chickens at once, depending on the available space. For example, you might be able to fit two to four whole chickens in a large oven, depending on their size and the arrangement of the cooking trays or racks.
If you're using a commercial oven or a larger oven, you may be able to cook even more chickens simultaneously, possibly up to a dozen or more, depending on the oven's capacity.
Keep in mind that overcrowding the oven can affect the cooking performance, so it's essential to allow enough space between the chickens to ensure even cooking and proper airflow.
Additionally, consider the type of dish you're using, as some cooking vessels might have different space limitations. For instance, a roasting pan or a baking dish might have a specific capacity for the number of chickens it can hold.
Always refer to your oven's user manual for guidelines on its capacity and safety recommendations. And if you're unsure, it's best to err on the side of caution and cook fewer chickens at a time to ensure they cook thoroughly and evenly.