TV size and viewing distance calculator: what size TV for your room?

The right TV size depends less on your wall than on how far you sit from it. A TV that fills a comfortable share of your field of view feels right; one that fills too little feels like a window across the room. Enter your distance or a TV size:

Know your size range? Will it fit? checks every current model against your wall and furniture too.

The two numbers behind every chart: 30° and 40°

Most sensible TV-size advice comes down to how wide an angle the screen fills in front of you:

• 40° — immersive. THX recommends about a 40° view for the best seat in a home theater. Movies and games feel big, closer to a cinema.
• 30° — relaxed. SMPTE’s cinema design guideline EG 18 (1994, since withdrawn but still the most quoted figure) put the minimum comfortable viewing angle at about 30°. It suits mixed viewing, news and sports where you want to take in the whole screen without moving your eyes much.

Anything between is fine. The calculator and charts on this page use exactly these two angles and the 16:9 screen shape:

• Screen size ≈ distance ÷ 1.2 (40°)
• Screen size ≈ distance ÷ 1.6 (30°)

with both distance and size in inches.

Chart: what size TV for your distance

The common sizes in each range:

• 5–6 ft (small bedroom, office, dorm): 43–55 inches
• 7 ft (bedroom, small living room): 55–65 inches
• 8 ft (typical living room): 65–75 inches
• 9–10 ft (larger living room): 75–85 inches
• 11–12 ft (open-plan or home theater): 85–98 inches, or a projector

Chart: where to sit for your TV size

The two right-hand columns answer a different question: how close you can get before your eyes resolve individual pixels, assuming 20/20 vision (one arcminute of detail). For 4K TVs that distance is so short that almost nobody sits that close, which is why old 1080p-era advice (“sit 1.5 to 2.5 times the diagonal away”) is now too conservative.

How close is too close for 4K? What the eye can actually see

The pixel columns in the chart above use the textbook figure for 20/20 vision: one arcminute of detail, or about 60 pixels per degree of view. That number comes from the Snellen eye chart, and it turns out to undersell good eyes. In 2025, researchers at the University of Cambridge and Meta measured the eye’s limit directly, with screens and patterns built for the purpose. They found the fovea resolves about 94 pixels per degree for black-and-white detail, about 89 for red–green, and much less (about 53) for yellow–violet (Ashraf, Chapiro & Mantiuk, Nature Communications, 2025).

Applied to TVs, the distance at which a sharp-eyed viewer could just make out single pixels is about half again as far:

Two conclusions follow. 4K is about right for an immersive seat: at 40° of view, the sharpest eyes are right at the point where they could start to resolve 4K pixels, and most people, most content and most colors are below it. 8K pays off only closer than that, with true 8K material, which is still scarce. For 1080p the same limit lies at 13 ft 3 in for a 65-inch screen, which is why a Full HD TV of that size looks soft from a normal sofa.

Why 30–40°: field of view and the “sensation of reality”

The 30° and 40° figures are industry guidelines, but they rest on research. In a classic 1980 study for NHK, Japan’s broadcaster, Hatada, Sakata and Kusaka measured how viewers’ sense of being “in” a scene changes with screen angle. The effect was small below about 20°, and horizontal angles of roughly 30° to 100° produced a sense of reality, with diminishing returns at the wide end. Home TVs sit at the low end of that range, where each extra degree is noticeable, which is why a bigger screen from the same seat feels so much more involving. Going much beyond 40° trades that involvement for eye and head movement to follow the action.

Seats off to the side

The chart assumes you sit in front of the screen. For a seat at an angle:

• LCD (most Mini LED and QLED TVs): VA panels lose contrast and color as you move off-center; the end of a long sofa may see a faded picture. OLED holds up far better. See OLED vs QLED.
• Distance: an off-center seat is farther from the screen than a center one; measure the main seat.
• Swivel: in an L-shaped room, a full-motion mount lets you turn the screen toward the seats you use (mount types).

Widescreen films look smaller

Most cinema films are wider than a TV: 2.39:1 against the TV’s 16:9 (1.78:1). On a 16:9 screen the picture fills the full width but only 74% of the height, with black bars above and below, so it has about three-quarters of the screen’s area. If you watch mostly films, that’s an argument for the larger of two sizes.

How to measure your viewing distance

1. Sit where you normally watch and measure from your eyes, not the back of the sofa, to the wall where the screen will be.
2. Subtract the TV’s depth from the wall: about 1–3 in when wall-mounted, or 10–15 in on its stand (the stand’s depth plus a gap).
3. If several seats matter, use the main one, or the average of the closest and farthest.

Room by room

Living room. Most sofas end up 8–10 ft from the TV wall. That’s a 65-inch TV at 8 ft and a 75- or 85-inch at 9–10 ft. If you’re torn between two sizes, the chart says you can usually go bigger than you think; few people return a TV for being too big.

Bedroom. From a bed 6–8 ft away, 50–65 inches. The constraint is often the dresser: see 55-inch TV dimensions for which stands fit narrow furniture.

Kitchen, office or dorm. At 4–6 ft, 32–50 inches.

Second row. Size for the front row; the back row sees a smaller picture, and the screen should be high enough to see over heads (or raise the rear seats).

Gaming. Many players prefer to sit closer than for films, nearer 40°, so the screen fills more of their view. Fast competitive games can be tiring if the screen is so wide your eyes keep moving to its edges.

Height matters too

The calculator covers horizontal angle; vertical angle matters for comfort. Aim to put the center of the screen near your seated eye level, usually around 40 in from the floor on a sofa. A TV above a fireplace, with its center 60 in or more up, makes you look up for hours, which most people find uncomfortable. If you must mount high, a tilting mount reduces glare and angle. Our stand guides calculate the furniture height that puts each TV’s center at eye level.

Common mistakes

• Measuring from the wall behind the sofa. It adds a foot or more.
• Picking by the wall’s width. A 75-inch TV on a 10-ft wall looks smaller than you’d expect from across the room.
• Using old 1080p charts for a 4K TV. They push you to sit farther away than you need to.
• Forgetting the box. A 75-inch TV comes in a box roughly 77 in long; check your route in. See TV dimensions by size.