TV Size Calculator
Convert a TV screen diagonal and aspect ratio into its actual width and height in inches and centimeters.
- Screen height (in)
- 26.96
- Width × height (cm)
- 121.8 × 68.5
Formula: width = d × aw / √(aw² + ah²)
About TV Size Calculator
TV Size Calculator is a free online calculator that gives you an instant, accurate result as you type. Convert a TV screen diagonal and aspect ratio into its actual width and height in inches and centimeters.
The calculation uses the standard formula width = d × aw / √(aw² + ah²) and updates live with every change to the inputs. Everything runs client-side in your browser — fast, private, and free to use as often as you like.
TV sizes are advertised by the screen diagonal, so a 65-inch 16:9 TV is actually only about 56.7 inches wide.
Frequently Asked Questions
Is TV Size Calculator free to use?
Yes. TV Size Calculator is completely free, with no sign-up, no downloads, and no usage limits. You can use it as many times as you like on any device with a web browser.
How accurate is this calculator?
The calculator applies the standard formula (width = d × aw / √(aw² + ah²)) with full floating-point precision and rounds only the displayed result. For most practical purposes the results are exact.
What aspect ratio should I use?
Virtually all modern TVs are 16:9. Ultrawide monitors are 21:9 (enter 21 and 9), and older CRT TVs were 4:3.
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