How many pounds of pinto beans to feed 400 as a side dish?

To serve pinto beans as a side dish for 400 people, you typically need about 1/4 to 1/3 cup of cooked beans per person. This translates to approximately 1/8 to 1/6 cup of dried beans per person, which is about 50-67 pounds of dried pinto beans in total, considering that dried beans roughly triple in weight when cooked. Therefore, you should plan for around 60 pounds of dried pinto beans to adequately feed 400 people as a side dish.