70% Blu-Ray discs are region-free

http://en.wikipedia.org/wiki/Blu-ray_Disc#Region_codes

Region codes

Regions for the Blu-ray standard:[65]
* A/1: The Americas, and their dependencies, East Asia (except Mainland China and Mongolia), Southeast Asia.

*B/2: Africa, Southwest Asia, Europe (except Belarus, Russia and Ukraine), Oceania, and their dependencies.

*C/3: Central Asia, East Asia (Mainland China and Mongolia only), South Asia, central Eurasia (including Russia), and their dependencies.

As with the implementation of region codes for DVDs, Blu-ray Disc players sold in a specific geographical region are designed to play only discs authorized by the content provider for that region. This is intended to permit content providers (motion picture studios, etc.) the ability to support product differences in content, price, release date, etc., by region. According to the Blu-ray Disc Association, "all Blu-ray Disc players...(and) Blu-ray Disc-equipped computer systems are required to support regional coding." [b]However, "Use of region playback codes is optional for content providers..."[66] Some current estimates suggest 70% of available Blu-ray (movie) discs from the major studios are 'region-code-free' and can therefore be played on any Blu-ray Disc player, in any region.[67][/b]

[b]Movie studios have different region coding policies. Among major U.S. studios, Paramount Pictures and Universal Studios have released all of their titles region-free.[68][69] Sony Pictures and Warner Bros. have released most of their titles region-free.[70][71][72] Lionsgate and Walt Disney Pictures have released a mix of region-free and region-coded titles.[73][74] 20th Century Fox has released most of their titles region-coded.[75][/b]