Is 140 pounds a normal weight for a 5'4 13-year-old girl?

It should be noted that whether one hundred forty pounds is normal for a 5'4" 13-year-old girl depends on factors such as body composition and overall health. The Body Mass Index (BMI) is a more accurate metric that takes into account both height and weight.

As a general guide:

Below the 5th percentile might be underweight.

5th to 85th percentiles are considered normal.

85th to 95th percentiles may suggest overweight.

Above the 95th percentile may indicate obesity.

Remember, these are general guidelines, and it is best to consult with a doctor for personalized advice based on the individual's health and age.