A small collection of nutrition related formulas. This app doesn't calculate anything! Broca Index. Body Mass Index Ponderal Index. Waist-to-Hip Ratio Waist-to-Height Ratio Harris-Benedict Harris-Benedict Harris-Benedict, Broca Index adaption. Mifflin-St. Jeor. Mifflin-St. Jeor, Broca Index Adaption. Mifflin-St. Jeor, Lean Body Mass.