How many calories should you eat if you are 40 years old 5'2 and you weigh 150 pounds?

Amount of any food per day is always subjective to the following: a. Age b. Health conditions c. Physical activity(calorie expenditure per day) d. General food habits(based on locality of individual, he may be consuming more of one food and may be immune to bad effects of it) e. Others There are many other minor factors which may determine the amount of calories that a person needs. So based on the law of individualism, each individual is unique and their needs are different based on various factors.