How far should you sit from your TV?

The correct viewing distance is not a personal preference. It follows from screen size, resolution, and published ergonomic standards.

THX and SMPTE standards4K and 1080pAll TV sizes

The standard

Where viewing distance comes from

Viewing distance is determined by your horizontal field of view. Two organisations publish the reference standards used by display manufacturers and cinema engineers: THX and SMPTE.

THX recommends a horizontal field of view between 28 and 40 degrees for comfortable home viewing, with a reference angle of 36 degrees. SMPTE sets 30 degrees as the minimum for reference viewing and 40 degrees as the preferred cinematic threshold. For gaming, 40 to 55 degrees is considered the immersive range.

36°

THX reference field of view

40°

SMPTE cinematic threshold

1.54x

Screen width multiplier at 36°

Reference table

Ideal distances by TV size

TV size	4K ideal range	4K sweet spot	1080p ideal range
43”	3.0 – 5.5 ft	4.0 ft (1.2 m)	4.5 – 6.5 ft
50”	3.5 – 6.5 ft	4.8 ft (1.5 m)	5.5 – 7.5 ft
55”	3.7 – 7.5 ft	5.3 ft (1.6 m)	6.0 – 8.0 ft
65”	4.2 – 8.5 ft	6.3 ft (1.9 m)	7.0 – 9.5 ft
75”	5.0 – 10.0 ft	7.3 ft (2.2 m)	8.0 – 11.0 ft
85”	5.7 – 11.0 ft	8.2 ft (2.5 m)	9.0 – 12.5 ft
98”	6.5 – 13.0 ft	9.5 ft (2.9 m)	10.5 – 14.5 ft

The sweet spot is the distance at the THX reference angle of 36 degrees. The range spans from the 4K pixel minimum (lower bound) to the THX 28-degree threshold (upper bound).

The formula

How to calculate it yourself

The formula is: optimal distance = screen width / (2 × tan(FOV / 2)). For the THX 36-degree reference, this simplifies to: distance = screen width × 1.54.

Screen width in inches can be calculated from diagonal size using the 16:9 aspect ratio: width = diagonal × 0.872. So for a 65-inch TV: width = 65 × 0.872 = 56.7 inches. THX distance = 56.7 × 1.54 = 87 inches = 7.3 feet.

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Quick rule: for 4K TVs, multiply the screen diagonal in inches by 0.065 to get the sweet-spot distance in feet. For 1080p, multiply by 0.09.

FAQ

Common questions answered

What is the ideal viewing distance for a TV?

The ideal viewing distance depends on screen size and resolution. For a 4K TV, the ideal range is 1.0 to 1.5 times the screen width in inches, converted to feet. For a 65-inch 4K TV, that is 5 to 8.5 feet. For 1080p, the ideal range is 1.5 to 2.0 times the screen width. These ranges come from THX and SMPTE field-of-view standards.

Is sitting too close to the TV bad for your eyes?

Sitting closer than the minimum resolution distance causes pixel visibility and can cause eye strain over long sessions. However, there is no evidence that sitting close causes permanent vision damage in adults. The concern is comfort and fatigue, not physical eye damage. Modern 4K TVs have minimum distances as low as 3 feet for 43-inch screens.

What is the THX recommended viewing distance?

THX recommends a horizontal field of view between 28 and 40 degrees, with a reference angle of 36 degrees. At 36 degrees, the optimal viewing distance equals approximately 1.54 times the screen width in the same unit. For a 65-inch TV with a screen width of 56.7 inches, the THX reference distance is about 87 inches (7.3 feet or 2.2 metres).

Does the ideal distance change for gaming?

Yes. Gaming benefits from a closer distance and wider field of view for immersion. SMPTE recommends 40 to 55 degrees for gaming, compared to 36 degrees for general viewing. At 55 degrees the viewing distance is approximately 1.0 times the screen width. For a 65-inch TV, that is about 4.7 feet. This is well within the 4K pixel-safe range.

Get your exact recommended distance

Enter your TV size and resolution for a precise recommendation from the calculator.

Viewing distance calculator TV size guide