Human Body Measurements
A few examples of what you can ask Wolfram|Alpha about:
Body Measurements
compute various body statistics based on height and weight
specify age and/or sex
specify age category
Body Mass Index
compute a body mass index
compute a weight corresponding to a BMI
Body Surface Area
estimate body surface area
Growth Charts
compute growth charts for a given age
specify age and sex
specify height and/or weight
specify a percentile
Metabolic Rate
compute metabolic rate and energy expenditure