Who calculates WPI?

WPI is calculated by the Office of Economic Advisor (OEA), Department of Industrial Policy and Promotion, Ministry of Commerce and Industry.You can read about the WPI – Wholesale Price Index [UPSC Indian Economy Notes] in the given link.

Further readings:

1. Consumer Price Index (CPI) – Indian Economy Notes
2. Topic-Wise GS 3 Questions for UPSC Mains