Screen Size Calculator

Enter your screen's Diagonal Size and Aspect Ratio (or Width and Height) into the Screen Size Calculator to find your display's Screen Area, exact dimensions, and Optimal Viewing Distance — so you know whether that monitor or TV will actually fit your space and your eyes.

inches
inches
inches

Results

Screen Area

--

Diagonal Size

--

Width

--

Height

--

Optimal Viewing Distance

--

Screen Dimensions Comparison

Frequently Asked Questions

What is screen size and how is it measured?

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.

How do aspect ratios affect screen size calculations?

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.

What is the optimal viewing distance for my screen?

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.

Can I calculate screen dimensions if I only know one measurement?

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.

What's the difference between 16:9 and 16:10 aspect ratios?

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.

How do I choose the right screen size for my room?

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.

More Construction Tools