One cup of cooked rice is about equivalent to one-third cup of dried rice. Due to the 2:1 ratio of the rice cooking process, most dried rice triples in size when cooked.

While different types of rice vary slightly in their quantities and cooking durations, one cup of dried rice typically produces between three and four cups of cooked rice. Long- and whole-grain rice varieties often produce marginally more than medium- and short-grain rice variants. Follow the cooking instructions on the container or combine rice, water, salt, and butter in a pot. Bring to a simmer. Reduce temperature and cover. Typically, one-third cup of dried rice is combined with two-thirds cup of water.