Screen Size Calculator
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About Screen Size Calculator
Find the real width and height of any TV or monitor from its diagonal and aspect ratio.
Screen sizes are sold by the diagonal, but what really matters for your wall, desk or TV stand is width and height. A screen size calculator turns a diagonal like 55 inches into real dimensions, so you know if a TV fits between speakers or if a 34 inch ultrawide fits your desk before you buy.
Screen Dimensions Formula
For a screen with aspect ratio W:H and diagonal D, width equals D times W divided by the square root of W squared plus H squared, and height equals D times H divided by the same value. A 55 inch 16:9 TV is about 47.9 inches wide and 27 inches tall, while a 65 inch is about 56.7 by 31.9 inches.
Quick Size Guide
- 24 inch 16:9 monitor: about 20.9 x 11.8 inches
- 27 inch 16:9 monitor: about 23.5 x 13.2 inches
- 34 inch 21:9 ultrawide: about 31.3 x 13.3 inches
- 75 inch 16:9 TV: about 65.4 x 36.8 inches
Remember to add a little for the bezel and the stand.
Which App The Install Button Opens
No app uses this exact name, so the button opens a related app, Screen Size Simulator on Google Play, which recommends the right TV size and shows how screen sizes look at different viewing distances. Plan your seating with our Viewing Distance Calculator.
Key Features
- Width and height from diagonal and ratio
- Works for 16:9, 21:9, 16:10 and 4:3
- Helps plan wall, desk and stand space
- Recommends TV sizes for your room
- Inch and centimeter friendly
Our Take On Screen Size Calculator
What We Like
- Avoids buying a screen that does not fit
- Clear numbers for any size
- Useful for TVs and monitors
What Could Be Better
- Bezel and stand sizes vary by model
- Related app is focused on TV size simulation
Download Safety
- Official source You get it from the developer's own website.
- No changes made You install the developer's own build, nothing in between.
Questions People Ask About Screen Size Calculator
01 How wide is a 55 inch TV?
A 55 inch 16:9 TV screen is about 47.9 inches wide and 27 inches tall, plus the bezel.
02 How do I measure screen size?
Measure diagonally from one corner of the visible screen to the opposite corner.
03 Is a 34 inch ultrawide bigger than a 27 inch monitor?
It is much wider but only about the same height as a 27 inch 16:9 monitor.
04 Is Screen Size Calculator free to download?
Yes. Screen Size Calculator is free to download and install.
05 Is it safe to install Screen Size Calculator from here?
Yes. The button takes you to the developer's own download link, so nothing is changed or repacked on the way.
06 How do I update Screen Size Calculator?
Come back to this page and tap Install New Version. Install the new file over the old one and your settings and files stay, as long as both builds come from the same source.
How To Install Screen Size Calculator
- Tap the download button. The developer's official download page opens.
- Tap their APK download button and wait for the file to save.
- If Android asks, allow "Install unknown apps" for your browser. You only do this once.
- Open the file and tap Install.
Updating? Install the new APK over the old one. Your data stays, as long as both came from the same source.
All apps are the property and trademark of their developers. Downloads are served from the official source shown on each page. We do not host modified or cracked files.