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TV Distance Calculator
A TV distance calculator tells you how far to sit from your television so the picture looks sharp without straining your eyes. Enter your TV size and resolution, and this free tool gives you a recommended viewing distance range in feet and metres — or work backwards from your sofa to find the right TV size for your room.
TV size is the diagonal screen measurement in inches, as advertised. Seating distance is measured from your eyes to the screen.
How it works
The best viewing distance depends on two things: how big the screen is and how many pixels it has. A bigger screen fills more of your field of vision, so you need to sit farther back. A higher resolution packs more pixels into the same screen, so you can sit closer before the picture starts to look grainy. That is why the same 65-inch screen has a different recommended range in HD, 4K and 8K.
The multipliers. This calculator uses the standard distance multipliers that TV makers and home-theatre guides use. For HD, multiply the diagonal by 1.5 for the nearest good seat and by 2.5 for the farthest good seat. For 4K, multiply by 1 to 1.5. For 8K, multiply by 0.75 to 1. The low end of the range is the closest seat where the picture still looks smooth; the high end is the farthest seat where the screen still feels immersive.
From TV size to distance. Pick your resolution, enter the diagonal size in inches, and the tool multiplies it by the two numbers for that resolution. A 55-inch 4K TV gives 55 × 1 = 55 inches and 55 × 1.5 = 82.5 inches, which is 4.6 to 6.9 feet. The same 55-inch screen in HD gives 82.5 to 137.5 inches, or 6.9 to 11.5 feet — a much longer room.
From seating distance to TV size. If your sofa is fixed, measure the distance from your eyes to the screen and switch the mode to "TV size from seating distance". The tool divides your distance by the multipliers instead of multiplying. For 4K, divide the distance in inches by 1.5 for the smallest good size and by 1 for the largest good size. An 8-foot seat is 96 inches, so a 4K TV between 64 and 96 inches suits it — a 75-inch or 85-inch set is a comfortable pick.
Metres and inches. Every answer is shown in feet, inches and metres, because room plans and TV boxes use different units. One inch is 0.0254 metres, so the tool divides the inch distance by 39.37 to get metres. If your room is 3 metres deep, that is about 9.8 feet, and you can quickly see which screen sizes fit.
Height matters too. Distance is only half the setup. Mount or place the TV so the centre of the screen is close to your eye level when you are seated — about 42 inches from the floor for a typical sofa. A screen mounted high above a fireplace forces you to tilt your head back for the whole film, and that causes more neck strain than sitting a foot too close ever will. If you tilt the screen down slightly, keep the tilt small, under about 10 degrees.
Worked example
Find the best viewing distance for a 65-inch 4K TV.
Step 1: Note the inputs. The diagonal is 65 inches and the resolution is 4K, so the multipliers are 1 and 1.5.
Step 2: Find the nearest good seat. Multiply 65 × 1 = 65 inches.
Step 3: Find the farthest good seat. Multiply 65 × 1.5 = 97.5 inches.
Step 4: Convert inches to feet by dividing by 12. 65 ÷ 12 = 5.4 feet, and 97.5 ÷ 12 = 8.1 feet.
Step 5: Convert inches to metres by dividing by 39.37. 65 ÷ 39.37 = 1.65 metres, and 97.5 ÷ 39.37 = 2.48 metres.
Try it yourself: choose "Viewing distance from TV size", pick 4K, enter 65 inches, and press Calculate. The tool gives exactly the same answer — 5.4–8.1 ft, which is 65.0–97.5 inches (1.65–2.48 m). Put your sofa anywhere in that band and the picture will look sharp and fill your view nicely.
FAQ
How far should I sit from a 65-inch 4K TV?
For a 65-inch 4K TV, sit about 5.4 to 8.1 feet away, which is 65.0 to 97.5 inches or 1.65 to 2.48 metres. That range comes from multiplying the 65-inch diagonal by 1 to 1.5. Sitting closer than about 5.4 feet can make individual pixels visible and force your eyes to work hard, while sitting much farther than 8.1 feet makes the picture feel smaller and wastes the detail that 4K offers.
Does resolution change the best viewing distance?
Yes, resolution changes it a lot. A higher resolution packs more pixels into the same screen, so you can sit closer without seeing the pixel grid. Use about 1.5 to 2.5 times the diagonal for HD, 1 to 1.5 times for 4K, and 0.75 to 1 times for 8K. That is why a 55-inch 4K TV works well at 4.6 to 6.9 feet, while the same size in HD needs roughly 6.9 to 11.5 feet.
Is the TV size measured diagonally?
Yes. TV sizes are always the diagonal measurement of the screen itself, from one corner to the opposite corner, not counting the bezel or the stand. A 65-inch TV is 65 inches diagonally, and its width is about 56.7 inches and its height about 31.9 inches for a standard 16:9 screen. This calculator uses the diagonal size you enter, so enter the number the manufacturer advertises.
What TV size should I buy for my seating distance?
Measure the distance from your eyes to the screen in feet, then use the reverse mode of this calculator. For 4K, divide your seating distance in inches by 1.5 for the smallest good size and by 1 for the largest good size. If your sofa is 8 feet (96 inches) from the screen, a 4K TV between 64 and 96 inches works well, so a 75-inch or 85-inch set is a good fit. For HD at the same distance, you would need a much larger screen or a closer seat.
Should I mount my TV at eye level?
Yes, mount or place the TV so the centre of the screen is close to your eye level when seated, usually about 42 inches from the floor for a typical sofa. That keeps your neck neutral and avoids glare from ceiling lights. A TV mounted too high forces you to tilt your head back for every show, and a TV placed too low makes you look down. Measure your seated eye height, then centre the screen on that height.