Runs on your deviceCalculatorFree to use

Find the right TV size for how far you sit, or the best seat distance for the TV you have, with a wall-width check.

Preparing your workspace…

Files and inputs stay on your device. Use Reset to clear this workspace.

A QUICK GUIDE

How to use this tool

Too small and the picture feels far away; too big and you see pixels or turn your head. The right size depends on how far you sit and the picture quality.

Choose whether you know your seating distance or your TV size.
Pick the picture resolution and how you watch.
Read the size or distance, the screen dimensions and whether pixels will show.

How this tool works

The screen should fill about 28° (relaxed) to 40° (cinema) of your view, following SMPTE and THX guidance. A 16:9 screen is 0.872 × its diagonal wide. Pixels stop being visible where each pixel is smaller than one arcminute of your view.

Limits and assumptions

Uses the common 28–40° viewing-angle guidance (SMPTE and THX) and normal eyesight for when pixels stop showing. Sizes are for 16:9 screens without the frame. Results update as you change any value; there is no Calculate button.

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Useful to know

What size TV for a 3 metre sitting room?

Most people are comfortable with about 65″ to 85″ at 3 m for 4K; choose the relaxed style for everyday TV.

Is 4K worth it on a small TV?

Only if you sit close: at normal distances Full HD and 4K look alike below about 43″.

Where are my files and inputs processed?

This tool processes your entries on your device. It does not upload them or save them in an account. Downloads remain on your device; Reset clears the current tool workspace.

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TV Size & Viewing Distance Calculator

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