Who calculates CPI?

The Consumer Price Index (CPI) is calculated by the Central Statistics Office (CSO) which functions under the Ministry of Statistics and Program Implementation.You can read about the Consumer Price Index (CPI) – Indian Economy Notes in the given link.

Further readings:

1. WPI – Wholesale Price Index [UPSC Indian Economy Notes]
2. Topic-Wise GS 3 Questions for UPSC Mains