TDEE (Total Daily Energy Expenditure) is the amount of calories you burn per day. You can use the tdee calculator. It takes into account your age, gender, weight, height and level of physical activity. Enter this data and you will receive information about your daily energy expenditure. This will allow you to determine how many calories you need to consume to achieve your goals. If you want to lose weight, you need to create a calorie deficit. To gain weight, you need to consume more calories than you burn. Eat a balanced diet, including proteins, fats, and carbohydrates.