TV Size Calculator
Convert TV diagonal size to width and height in inches and cm. Supports 16:9 and 4:3 aspect ratios.
How to use this tool
- Enter diagonal size and aspect ratio in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your width and the full breakdown beneath it.
Enter your TV's diagonal measurement to find the actual width and height of the screen.
Frequently asked questions
- How wide is a 55-inch TV?
- A 55-inch 16:9 TV is approximately 47.9 inches (121.8 cm) wide and 27.0 inches (68.5 cm) tall.