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What is the right number of calories I should have in one day?

What is the ideal number of calories I should have in one day? Is it determined by weight and height? How can I know if I'm eating too much or too little? I'm 6 foot and weight 175 pounds.
The exact number of calories that you should eat in a day depends both on your gender and also on your current height and weight. For example, if you are overweight and you are trying to lose some weight, then this obviously means that you will have to consume less calories. Based on your data that you provide (6 foot and 175 pounds), I have calculated your body mass index at 23.7 (assuming you are male). This puts you in the range of healthy weight for your height, so you shouldn't need to lose any weight. A BMI of greater than 25 would put you in the overweight category. Assuming you don't need to lose any weight, then the amount of calories you should consume also will depend on your age (the older you are the less calories you need) and your activity level. If you are a professional athlete you will obviously need more calories than if you have a desk job! One excellent approach would be to talk with your dietitian. He or she will be able to assess your activity level and help you calculate how many calories you should be taking in.
This answer is for general informational purposes only and is not a substitute for professional medical advice.
If you think you may have a medical emergency, call your doctor or (in the United States) 911 immediately. Always seek the advice of your doctor before starting or changing treatment. Medical professionals who provide responses to health-related questions are intended third party beneficiaries with certain rights under Zocdoc’s Terms of Service.

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