Laptops with smaller screens tend to be lighter and more portable, while those with larger screens can be more pleasant to use and easier to read. If you're thinking about buying a new laptop of a different size or recommending yours to a friend, you might want to know your current laptop screen size. Unfortunately, determining screen size can be confusing, since the screen size is not measured straight across the laptop screen either vertically or horizontally.
Open your laptop.
Place the end of the measuring tape in the top left corner of your laptop screen. Do not measure all the way to the corner of the laptop, only the screen itself.
Pull your measuring tape snugly to the bottom right corner of your laptop screen.
Read the measurement on your measuring tape. This will tell you the screen size of your laptop.