How much space do I need around my TV?

Diagonal:
Aspect ratio: Standard 4:3  HDTV 16:9  Cinema 21:9 (64:27)

Height:
Width:

How big should my TV be for a given viewing distance?

Viewing distance:
Aspect ratio: Standard HDTV/Cinema

THX minimum (28°) Enthusiast optimum (30°) THX optimum (40°)
     

How far should I be from my TV for a given TV size?

Television size:
Aspect ratio: Standard HDTV/Cinema

THX optimum (40°) Enthusiast optimum (30°) THX maximum (28°)