How many calories do I need to lose 15 pounds?

Here is the math: 1 pound of fat = 3500 calories 3500 calories x 15 pounds = 52,500 calories (total caloric deficit to lose 15 pounds) 52,500 / 30 days = 1750 calorie deficit per day.

cnn.com - Is it possible to lose 15 pounds in one month? - CNN.com

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Expert answer

Hi Jenna -- While it is possible to lose 15 pounds in one month, I would not recommend it for you for several reasons. First of all, at 16 years old you are in the midst of an important period for growth and bone development, and losing weight too quickly (more than 1-2 pounds per week), could result in bone loss which could affect bone density in adulthood. Secondly, losing weight too quickly when you don't have a significant amount of weight to lose can result in muscle loss as well as fat loss, which can decrease your metabolism and make it more difficult to maintain your weight loss. Finally, in order to lose 15 pounds in 30 days, at your height, weight and age, you would need to reach a 1750 calorie deficit every day. Here is the math: 1 pound of fat = 3500 calories 3500 calories x 15 pounds = 52,500 calories (total caloric deficit to lose 15 pounds) 52,500 / 30 days = 1750 calorie deficit per day. This means that you would have to eat 1750 calories fewer, burn 1750 calories more per day, or a combination of calorie reduction and exercise. To give you an example of what it would take to burn 1750 calories per day for someone your size, you would need to jog for 4 hours per day at a pace of 5 miles per hour and as you lost weight and got more fit, you would have to increase this amount slightly as you burn fewer calories the less that you weigh and the fitter that you are. Assuming that you are moderately active, your total daily calorie needs are only about 2000 calories, so cutting 1750 calories would be virtually impossible and unsafe. I recommend aiming for a healthy, 1-2 pound weight loss per week and make sure to include plenty of low fat or fat free dairy, lean protein and exercise to prevent bone and muscle loss.

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Is 15 pounds a lot to lose in 2 months?

Although everyone's body is different, in general people can expect to lose one to two pounds a week if they are doing so in a sustainable manner. "Over the course of two months or eight weeks, a healthy weight-loss goal is eight to 16 pounds," White said.

yahoo.com - Yes, You Can Lose Up to 15 Pounds in 2 Months (and Keep It Off) - Yahoo

When people are trying to figure out how to lose 15 pounds, they typically want whatever will get them results as fast as possible. In reality, there is no such thing as a quick fix for weight loss. Juice cleanses, strict low-calorie diets, and "detoxes" deliver more hype than actual results. Sure, the scale may go down as you lose water weight, but pounds will just come back on (and then some) once you eat full meals again. If you're looking to really lose weight - as in: lose fat, change your measurements, and go down a dress size - then you need to be strategic to get results. You can definitely lose weight and see results within two months as long as you follow these steps. We spoke to registered dietitian and personal trainer Jim White, RDN, ACSM, owner of Jim White Fitness and Nutrition Studios, who outlined these six ways to lose weight and see results within just eight weeks. And not just that, but keep it off for good. Related: A Dietitian Reveals How Many Pounds You Should Lose in a Week to Keep the Weight Off For Good

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