Have you heard of BMI (Bady Mass Index)?
Well BMI (Body mass index) is a measure of body fat based on height and weight that applies to both adult men and women.
These are the BMI Categories:
Underweight = less then 18.5
Normal Weight = 18.5 to 24.9
Overweight = 25 to 29.9
Obesity = 30 and above
You can go to your MySpark and click on "CHANGE DIET GOALS" where you'll see your BMI chart. From your BMI you'll know what your weight should be.