Health indicators to assess obesity:- 1. Body mass index(Quetelet&;s index): weight(kg) by height square (metre sq). 2. Ponderal Index: Height(cm) by cube root of weight(kg). 3. Brocca Index: Height(cm) minus 100. 4. Lorentz&;s formula 5. Corpulence index: Actual weight by desirable weight. Body mass index and Brocca index are widely used. {Reference: Park&;s textbook of community medicine 23 rd edition pg no. 399}