The Screen Size Calculator works out the full physical dimensions of any TV, monitor, or display from just one measurement. Enter your screen's diagonal size, width, or height, then select your aspect ratio and unit system to get the screen area, all three dimensions, and the optimal viewing distance for your room.
Screen Area
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Diagonal Size
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Width
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Height
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Optimal Viewing Distance
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Screen size refers to the diagonal measurement of a display screen from one corner to the opposite corner. It's typically measured in inches and doesn't include the bezel or frame around the screen.
Aspect ratio is the proportional relationship between width and height. Common ratios include 16:9 for HDTVs, 16:10 for computer monitors, and 4:3 for older TVs. The aspect ratio determines the shape and affects the actual width and height for any given diagonal size.
The optimal viewing distance depends on screen size and resolution. For HD content, sit 1.5-2.5 times the diagonal screen size away. For 4K content, you can sit closer, typically 1-1.5 times the diagonal size, allowing you to see more detail without pixelation.
Yes! If you know any one dimension (width, height, or diagonal) along with the aspect ratio, you can calculate all other dimensions. The aspect ratio provides the proportional relationship needed for the calculations.
16:9 is the standard widescreen format used for HDTVs and most consumer content. 16:10 is slightly taller and commonly used for computer monitors, providing more vertical space for productivity tasks and web browsing.
Consider your seating distance and room size. Measure the distance from your viewing position to where the screen will be mounted, then use the viewing distance guidelines to determine the appropriate screen size range for optimal viewing experience.