How many calories should you eat a day?
It depends on age, sex, size and activity. US guidelines estimate about 1,600 to 2,400 calories a day for adult women and 2,000 to 3,000 for adult men.
Food labels in many countries use 2,000 calories a day as a general reference, but individual needs vary widely. Younger, taller and more active people need more energy. Needs usually decrease with age, because metabolism slows and people tend to be less active. Pregnant and breastfeeding women need extra calories.
The Dietary Guidelines for Americans give ranges based on activity level. A sedentary adult woman may need around 1,600 to 2,000 calories, while a very active young man may need up to 3,000 or more. Athletes in heavy training may need much more.
Quality matters too
The source of calories matters as well as the amount. Diets built around vegetables, fruits, whole grains, lean proteins and healthy fats support long-term health better than diets high in sugary drinks and processed foods. A doctor or registered dietitian can give advice suited to an individual.
Did You Know?
A person's resting metabolism alone accounts for about 60 to 70 percent of the calories they burn each day.
This answer is general information, not medical advice. For a personal health question, talk to a doctor.