The Basics
To stay at a healthy weight, you need to balance the calories you eat with the calories you use up (or burn). To lose weight, you need to use more calories than you eat. A healthy diet and physical activity can help you reach your goal.
How do I know if I'm eating the right number of calories?
Use this calculator to find out the number of calories your body needs each day. This is the number of calories you need to maintain your current weight.