There are about 220 calories in a serving of cooked white rice. However, one should consume less than 500 calories per day if they want to lose weight and keep it off. Try brown rice, which has more fiber and nutrients like magnesium and selenium. It also contains fewer calories than white rice or other types of refined grains like breads that have been stripped of their natural fiber content after processing. The downside is that brown rice takes longer to cook for those who don’t own any nutritional knowledge before tackling the dish on their own. Another plus is that protein-packed beans can also complement the Mexican dishes well (think black beans), adding some substance along with digestion-aiding qualities to the preparation.