How To Measure A Laptop In Inches. A basic macbook air has an approx measurement of 15 inches or above. In both cases, you have to measure accuracy and consider if your laptop is slightly trapezium.
It is important to close the laptop that you have to measure the size properly. Specify the size of the diagonal of your screen in inches (). This is what your laptop size would be.
You can either measure in inches or cms.
Firstly, close your laptop for better accuracy. Alternatively, you can use a ruler and put it on the edges of your laptop. This is the height of your laptop, add a few cm or an inch or 2 to make sure your device won’t be sticking out of a bag or sleeve. These specifications would either be on the casing you bought it in, available from its user manual or you can check the cover on the bottom of your laptop to see if they are there.