TV Size Calculator
Find out how wide and tall a TV screen is from its diagonal size, and how far to sit from it.
How to use the TV Size Calculator
- Enter the diagonal screen size in inches.
- Choose the aspect ratio (16:9 for TVs).
- Read the width, height and viewing distance.
How it works
TV sizes are measured diagonally. For a 16:9 screen, width = diagonal × 0.8716 and height = diagonal × 0.4903: a 55″ TV’s screen is about 47.9″ × 27″. Add 1–3 inches for the frame and stand when checking whether it fits. For 4K TVs a common guideline is to sit 1–1.5 times the diagonal away.
Popular tv size conversions
- 24 inch TV dimensions
- 32 inch TV dimensions
- 40 inch TV dimensions
- 42 inch TV dimensions
- 43 inch TV dimensions
- 48 inch TV dimensions
- 50 inch TV dimensions
- 55 inch TV dimensions
- 58 inch TV dimensions
- 60 inch TV dimensions
- 65 inch TV dimensions
- 70 inch TV dimensions
- 75 inch TV dimensions
- 77 inch TV dimensions
- 80 inch TV dimensions
- 83 inch TV dimensions
- 85 inch TV dimensions
- 86 inch TV dimensions
- 98 inch TV dimensions
- 100 inch TV dimensions
16:9 TV dimensions
| Size | Width | Height | 4K viewing distance |
|---|---|---|---|
| 32″ | 27.9″ | 15.7″ | 2.7–4 ft |
| 43″ | 37.5″ | 21.1″ | 3.6–5.4 ft |
| 50″ | 43.6″ | 24.5″ | 4.2–6.3 ft |
| 55″ | 47.9″ | 27″ | 4.6–6.9 ft |
| 65″ | 56.7″ | 31.9″ | 5.4–8.1 ft |
| 75″ | 65.4″ | 36.8″ | 6.3–9.4 ft |
| 85″ | 74.1″ | 41.7″ | 7.1–10.6 ft |
Frequently asked questions
How wide is a 65-inch TV?
About 56.7 inches (screen only), roughly 57–58″ with the frame.
How far should I sit from a 55″ TV?
About 4.6–6.9 feet for 4K.
Are TVs measured diagonally?
Yes — from one corner of the screen to the opposite corner.
What size TV for a 10-foot distance?
About 80–120 inches for immersive 4K viewing; 65–75″ is a common practical choice.