Barb will be the first independent ratings agency to measure the audiences of the streaming service.
Barb is the first ratings service in the world that is owned by an industry.
snapshots of its viewing data highlight the success of its most popular shows
Barb will report the figures from November.
The data will be used by advertisers, competitors and journalists to determine the success or failure of the properties.
Audience measurement and TV ratings are compiled by Barb.
The ratings will be reported the same way it is reported for more than 300 other channels.
Smaller channels such as Dave and E4 are included in the coverage of Barb.
The news comes as it's reported that the company is about to launch an ad-supported tier.
Reed Hastings, its co-chief executive, said that he was in favor of the idea of measuring audiences on their own.
Since then, we've kept in touch with Barb, and we're pleased to make a commitment to the measurement of how people watch television.
Barb's audience measurement constantly adjusts to accommodate the new platforms and devices that are being used by people to watch their favourite television shows.
Audiences were reported to streaming services last year.
It is clear that what we are doing is valuable to new and established players in the market.
All Barb subscribers will have access to the viewing data from the morning of 2 November.
The launch of The Crown's fifth season coincides with Barb's inclusion on the streamer, which could have an impact on Barb's ratings.