If you want to know the overall health of your body, getting your weight is the first step.  Just adding some more steps more you will know your Body Mass Index (BMI).  This is an accepted effective tool.  Get your weight by using a bathroom scale in pounds.  So if you are 120 lbs and 5 ft.  Use a calculator and multiply 703 by your weight.  This will change your weight to the metric system.  So for 120 lbs x 703 = 84,360.  Take down the result. 

Find your height in inches using a tape measure.  Your height is multiplied by itself.  So for 5 ft = 60 inches x 60 = 3,600 inches. Divide the first calculated number by the second and you will get your BMI.  So 84,360 / 3,600 = 23.43.  Using the table you are considered Normal.  Check your BMI with the table.  If below 18.5 then its underweight, if it is between 18.5 and 24.9, normal, if 25.0 to 29.9, overweight and 30.0 over is a candidate for obesity.