Here are some tools that will help you with your fitness goals. Keep in mind, not everything is completely accurate when it comes to calculating these items, but its a good guideline to start with.
Body Mass Index (BMI) will help you calculate your ideal weight.
Basal Metabolic Rate (BMR) will help you calculate your ideal caloric intake.
Body Fat % (BF%) helps you determine where you are in regards to fat/muscle ratio.