The amount of rice you need to cook in a rice cooker for 6 people depends on the size of your rice cooker. Typically, you will need around 1.5 cups of uncooked rice to make enough rice for 6 people. However, if your rice cooker is on the smaller side, you may only need 1 cup of uncooked rice. Be sure to check your specific rice cooker's instructions to determine the correct amount of uncooked rice to use.