How do you calculate the poverty line?

The poverty line in India defines a threshold income; households earning below this threshold are considered poor. In 2011, the Suresh Tendulkar Committee defined the poverty line on the basis of monthly spending on food, education, health, electricity and transport. According to this estimate, a person who spends Rs. 27.2 in rural areas and Rs. 33.3 in urban areas a day are defined as living below the poverty line.