The best TV size for how far you sit, using SMPTE and THX viewing angles.
How this works
SMPTE suggests the screen fills at least 30° of your view; THX recommends about 36° to 40° for a cinema feel. Screen width = 2 x distance x tan(angle / 2), and a 16:9 diagonal is width / 0.872. Your eye can see single pixels on 1080p closer than about 1.6 x the diagonal, and on 4K closer than about 0.8 x.
Questions people ask
How do I use the TV Size and Viewing Distance tool?
Fill in the fields, starting with “Seat to screen distance”, “Viewing style” and “Resolution”, and change any other options that match your home. The answer, a drawing and practical tips update as you type, and the Copy link button saves your numbers in a link you can share.
Is the TV Size and Viewing Distance tool free?
Yes. The TV Size and Viewing Distance tool is free, with no sign-up, and works on phones, tablets and computers. The results are estimates to help you plan, so check with a qualified professional before structural, electrical, gas or plumbing work.