Screen Size Calculator
47.9" × 27"
Width × Height (inches)
121.8 × 68.5
Width × Height (cm)
Area: 1292.6 sq in / 8339.2 sq cm
Quick Facts
- •Width = diagonal × w / √(w² + h²)
- •55" 16:9 TV = 47.9" × 27.0"
- •Doubling diagonal quadruples the area
- •Ultrawide 34" (21:9) ≈ same height as 27" (16:9)
Related Converters
Frequently Asked Questions
How do I calculate screen width and height?
Given diagonal d and aspect ratio w:h: width = d × w / √(w² + h²), height = d × h / √(w² + h²).
What is a 55" TV's width?
At 16:9, a 55" TV is about 47.9" (121.7 cm) wide and 27.0" (68.6 cm) tall.
What aspect ratio is my TV?
Most modern TVs are 16:9. Ultrawide monitors are 21:9. Some laptops are 16:10 or 3:2.
Does bezel affect these measurements?
These calculate the screen area only. Total device size includes the bezel.
What is surface area used for?
Surface area helps compare screens. A 65" TV has ~2× the area of a 43" TV.