By dragging that above controls, you can use this calculator to figure both your Body Mass Index (BMI) and your Basal Metabolic Rate (BMR).

Unless you are extremely muscular or underweight, your BMI index coorelates with your percentage of body fat. Once you know your bmi index you can see where your current weight fits into the medical definition of obesity. This is important because your risk of obesity related illness goes up with you BMI.

Your BMR tells you how many calories that you burn every day if you have absolutely no activity, in other words *as long as you don't move or eat.*

**How do I calculate BMI?**

To use the calculator above select your sex, weight, height and age on the left.

On the right the big dial tells you your BMI. Your resting calories burned (BMR) is below that.

This formula isn't design for extremes. If you are extremely muscular or have extremely low body fat, you won't find accurate results.

**What does my BMI number mean?**

If your BMI is less that 18.5, you are underweight.

If your BMI is 18.5 - 24.9 you are in the normal range.

If your BMI is 25.0 - 29.9 you are considered overweight.

If your body fat index is over 30.0 you are considered obese.

**How do I determine my ideal body weight?**

If you want to know what your ideal weight is, drag the weight slider to the left until your BMI is between 18.5 and 25. I suggest that you start out with your goal a 24 BMI. Note what weight the calculator says gives you a BMI of 24. This is in the upper range of your ideal weight. Start with a goal in your upper range so that you don't feel overwhelmed. Subtract that weight from you current weight. Now you know how much weight you need to loose.

**Why is it so hard to maintain my weight as I get older? **

If you've been gaining the weight as you age, you can use this calculator to see how aging is affecting your metabolism. Before you start remember that an extra 3,500 calories is a pound of weight. Here's an example; if you are a 168 lb, 5'5" tall woman at 50 years of age your BMR resting metabolism will burn **47 less calories** per day that you did at age 40. In other words, if you don't take care of yourself by eating fewer calories or exercising more, you could be gaining a pound every 3 months with the same lifestyle that you had 10 years earlier.

**What else do I need to know? How about my waist to hip ratio?**

Besides knowing your BMI you also need to know the **size of your waist**. When you measure your waist make sure the tape measure is snug and that its parallel to the floor.

If you are a woman and your waist is over 35 inches / 89cm, or if you are a man and your waist is over 40 inches / 102 cm then you are putting yourself at much greater risk for obesity related diseases.

**Obesity Diseases: **

CO puts you at rick for a myriad of detrimental dysfunctional conditions and diseases.

To find out more about obesity related disease the U.S. Center for Disease Control has a nice pdf that you can download here.

Related Terms: overweight calculator, bmr calculator, bmi calc, obesity disease, difference between obesity and overweight