Developer Tools
TV Size Calculator
TV Size Calculator is a browser-based calculator tool on CalcToolsBase. Free, browser-based TV Size Calculator. Enter your input for an instant, clearly-labelled result - no signup, no uploads. To use it, enter your values and view the result directly in your browser — no signup and nothing to install.
Use TV Size Calculator to size a TV and viewing distance: give it your screen diagonal and aspect ratio, press Calculate, and read off the width, height, area and viewing distance — all worked out on your device.
Browser-side developer and utility helpers for everyday and learning use. Everything runs locally in your browser and nothing you enter is uploaded. Validate production or security-critical output with trusted, official tools before relying on it.
About this tool
The TV Size Calculator gives you a quick way to size a TV and viewing distance. Enter your screen diagonal and aspect ratio; it then returns the width, height, area and viewing distance, worked out with the diagonal and aspect ratio via Pythagoras the moment you calculate. It runs fully in the browser, so it is private by design and works offline once loaded.
How to use
- Enter the television diagonal in inches.
- Choose the aspect ratio for the set.
- Run the calculator to size the panel.
- Read the dimensions and viewing distance.
Why use the TV Size Calculator
Instant
Each result is computed on your device the moment you run the tool.
Private
The text and numbers you enter stay in your browser and are never uploaded.
Free
No signup and no paywall to use any tool in this set.
Works offline
Once the page has loaded it keeps working on a weak or dropped connection.
Built for developers
Plain inputs and outputs you can copy straight into code, configs, or notes.
Honest by design
Conversions and heuristics are for everyday and learning use; verify security-critical output with trusted, official tools.
Common uses
TV Size when comparing aspect ratios
TV Size when buying a display online
TV Size when planning a wall mount or desk
TV Size for picking a phone or laptop screen
TV Size for AV and furniture planning
TV Size when working out width and height from a diagonal
Technical notes
TV Size Calculator derives a TV's width and height from its diagonal and 16:9 aspect ratio using the Pythagorean theorem.
Results are reference values; validate against your own environment before relying on them in production.
Nothing you type is uploaded — the calculation happens entirely on your device.
Worked example
A 55-inch 16:9 TV measures about 47.94 in wide × 26.96 in tall (diagonal ÷ √(16²+9²) × each side).
FAQ
How is the suggested viewing distance found?
It is a rough range scaled from the diagonal, giving a near and far distance in feet for comfortable viewing.
Why is the area shown in square feet?
Television sizes are large, so square feet is easier to picture than square inches for room planning.
How does it differ from the screen size tool?
The physical width and height use the same method, but this tool adds a viewing-distance range and reports area in square feet.
Is the viewing distance a strict rule?
No. It is a general guideline; personal preference, content, and resolution all affect the ideal distance.