Different varieties of uncooked white rice contain very similar amounts of calories. One-quarter cup of uncooked long-grain white rice, which yields three-quarters to 1 cup of cooked rice, has about 170 calories. Short-grain and medium-grain varieties contain slightly more, about 180 calories. This is most likely due to the fact that one-quarter cup holds more of the smaller-sized grains. Specific brands may contain slightly more or less, so check the label on the brand you buy. Uncooked white rice is virtually fat free. Even an entire cup of uncooked white rice only has 1 gram of fat.