Quick Links
Summary
Got an old monitor that you don’t know the size of?
We’ll show you how to do it correctly and without scratching the screen.
For example, check out this Amazon listing for theSceptre E255B-FWD240 24.5-inch Gaming Monitorfor a real-world example.
Mark LoProto / How-to Geek
you might check the box it came in or look up the model name online.
Drag the other end to the opposite corner and read the measurement.
ensure to only measure the corners of the display; ignore the bezels and black bars around it.
frikota/Shutterstock.com
An alternative way to measure the diagonal length is with the help of the Pythagorean theorem.
That’s rightyour eighth-grade geometry classes are finally starting to pay off.
To calculate the diagonal length, measure the width and height of the monitor.
Ismar Hrnjicevic / How-To Geek
Or you could just throw in in the width and height in aPythagorean theorem calculator.
A display with a larger surface area technically equals a larger screen.
What About Curved Monitors?
You measure curved monitors the same way you’d measure a flat monitor.
If you need precise measurements, you might want to check the monitor’s specs sheet instead.
It doesn’t tell you the actual screen resolution but rather the between the width and height.
A 16:10 display would indicate a monitor with a slightly taller height.
Ultrawide monitors often have an aspect ratio of 21:9.
Screen resolutiontells you how manypixelsthere are on the screen.
Keep in mind that the display size listed in the product specifications is measured diagonally.
