What is put-call ratio (PCR)?
PCR divides total put open interest (or volume) by total call open interest (or volume) for an index or stock. Traders watch it alongside price and implied volatility for sentiment and hedging activity.
NSE publishes option chain data you can paste into this calculator—no login required.
How to use this tool
Use aggregate mode when you already have summed call/put OI from a chain footer or analytics screen.
Use by-strike mode to type strikes from the NSE option chain; we sum rows and compute PCR.
Switch between OI-based and volume-based PCR depending on whether you care about positioning or today’s flow.