I'm female and I am 5 foot 4 inches, how much should I weigh?

Healthy body weight. The healthy body weight range for you is 110-145 lbs based on body mass index. It does not take into account different body frames or build, muscle tone, etc. It's important to speak with a physician about your individual weight if you are unsure.
120 lbs +/- 10 % Ideal body weight is calculated for women as 100 pounds for 5feet and 5pounds for each additional inch. You can give or take 10 % for variations of structure. However, keep in mind, other important factors for weight are percent body fat ( muscle weighs more than fat), age and other physiologic factors.You can also calculate your body mass index as weight appropriate for height.