A kilocalorie is equivalent to 1,000 calories. A calorie is the amount of heat energy needed to raise the temperature of 1 kilogram of water 1 C, or 33.8 F. The word "calorie" is used by dietitians to mean kilocalorie when measuring the calorific, heating or metabolizing value of foods.
More than 20 states in the United States are considering passing calorie-count laws. Calorie-count laws are a type of law that require restaurant chains of 15 or more to post detailed information on the food served in a font equal to or larger than the size of the font of the item. New York was the first state to enact this law in 2009. Restaurants can be fined up to $2,000 for failing to comply.