Facebook Twitter Email Print Expert Advice Based on my height and weight, how many calories should I eat to lose weight? Answer Daily caloric intake depends on activity level in addition to sex, age, height, and weight. The more active a person is means more calories are needed to account for expenditure. The USDA has information available to determine how many calories you need on a daily basis. To lose weight, try to increase your activity level and consume slightly fewer calories than the recommended amount. Make sure half your plate is fruits and vegetables, and eat whole-grains, low-fat dairy and lean meats to aid weight loss. Check out our amazing fruit & veggie recipes for healthy meals.