We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
If this tool helped you, you can buy us a coffee ☕
Input TV diagonal inches, instantly calculate screen width, height, area and recommended viewing distance.
Planning to buy a new TV but aren't sure what size fits your living room? Or wondering if a specific TV will actually fit in your entertainment center? With this calculator, simply enter the diagonal screen size in inches (e.g., 65 inches) and select the aspect ratio (commonly 16:9 or 4:3) to instantly see the screen's width, height (in centimeters), and total area. It also provides the optimal viewing distance to help you decide if it's the right fit for your space.
Screen sizes are typically measured by their diagonal length in inches. 1 inch = 2.54 centimeters. For a known aspect ratio (like 16:9), we can calculate the exact width and height using the Pythagorean theorem:
More directly: Let the aspect ratio be a:b and the diagonal be D (in inches). The width (in cm) = 2.54 × D × a / √(a² + b²)；the height (in cm) = 2.54 × D × b / √(a² + b²).
Screen Area = Width × Height (in square centimeters).
Recommended Viewing Distance: It is generally recommended to be 2.5 to 3 times the screen height (for 16:9 Full HD), or 3 to 4 times (for 4K resolution). We provide a range based on 2.5 to 3 times.
Let's look at a specific example. Suppose you want to buy a 65-inch, 16:9 TV.
In our calculator, enter "65" for the diagonal, select "16:9" for the aspect ratio, and click calculate:
Interpreting the Results: This TV is about 1.44 meters wide and 0.81 meters high. If your TV stand is over 1.5 meters wide, it will fit perfectly. The optimal viewing distance is between 2 and 2.4 meters, which suits the sofa-to-wall distance in most living rooms.
Comparison Example 1: 55-inch 16:9 TV
Same aspect ratio, 55-inch diagonal. The calculated width is ≈ 121.8 cm, height ≈ 68.5 cm, area ≈ 8,343 cm², and recommended viewing distance is 1.71 to 2.06 meters.
Compared to the 65-inch model, it is 22 cm narrower and has about 28% less screen area. It is ideal for bedrooms or small living rooms with a viewing distance of under 3 meters.
Comparison Example 2: 50-inch 4:3 Older TV
50-inch diagonal, 4:
Simplified & Traditional Chinese Converter
Accurately convert between Simplified Chinese, Standard Traditional, Taiwanese Traditional, and Hong Kong Traditional Chinese. Supports custom dictionaries.
Random Chinese Name Generator
Bulk generate random Chinese names by gender, length, and surname for novels, games, and character design.
Fuel Consumption Calculator
Calculate key data like fuel consumption per 100km (L/100km) and cost per kilometer based on your driving distance, fuel volume, and gas price.
Chinese to Pinyin Converter
Convert Chinese characters (Hanzi) to Pinyin with tone marks or numbers. Features smart polyphone recognition and a dedicated name mode.
Simplified & Traditional Chinese Converter
Accurately convert between Simplified Chinese, Standard Traditional, Taiwanese Traditional, and Hong Kong Traditional Chinese. Supports custom dictionaries.
Random Chinese Name Generator
Bulk generate random Chinese names by gender, length, and surname for novels, games, and character design.
Fuel Consumption Calculator
Calculate key data like fuel consumption per 100km (L/100km) and cost per kilometer based on your driving distance, fuel volume, and gas price.
Chinese to Pinyin Converter
Convert Chinese characters (Hanzi) to Pinyin with tone marks or numbers. Features smart polyphone recognition and a dedicated name mode.
Noise Detector
Measure environmental noise decibel levels in real-time using your device's microphone. Evaluate noise levels at home, in the office, or in public spaces to protect your hearing.