The best way to use the bmi index is to first get a quick ballpark figure of your ideal weight, and then to compare it to what you weigh now, so that you can get an idea about how much weight you have to lose to reach this number.
All calculations that use the body mass index (BMI), only provide an approximate number, and should not be considered to be the true ideal weight.
The reason this ideal weight using BMI will not be completely accurate is that it does not take into account your lean body mass.
This ideal weight calculator can be used, and it is the best I have seen online.
But to get a true ideal weight I recommend reading my weight loss tracker section, where I explain how to calculate ideal weight using your lean body mass (LBM).
And by having the interpreting your weekly weight loss chart page, will explain how to stay on track toward your major health goal.
Another tool that I have created and that can help you tremendously with creating a lean, healthy body is in the goal setting section.
The major health goal chart will help you to find the main target that you can aim at and move toward to create the body of your dreams.