How much body fat should an average 19 year old woman have?

Body Fat Percentile

Body fat percentile provides the most accurate estimate of body composition. Body fat percentile is an indication of the percent of your body that is made of fat. Normal body fat percent for women is 20 to 30 (for men it is lower). In women, below 17 is extreme low body fat; between 30 to 33, high body fat; and above 34, extremely high body fat or obese. The recommended healthy body fat percentiles increase slightly with age. Source: http://life.familyeducation.com/weight/health/35880.html See the chart at the link above, or use their BMI (body mass index) calculator, to get a better idea of what is normal for your age, height and body type.