Practical measurement guide
Laptop Screen Size in CM
Convert common laptop screen diagonals from inches to centimeters and understand what the diagonal measurement means.
Laptop screen size is measured diagonally; multiply the inch diagonal by 2.54 to get centimeters.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Fractions
15.6 in = 39.624 cm
15.6 in × 2.54 = 39.624 cm
Decimal inches15.6 in
Feet + inches1 ft 3.6 in
Nearest 1/16 inch15 5/8"
Direct laptop screen size answer
Laptop screen size is normally the diagonal measurement. For example, a 15.6-inch laptop screen has a diagonal of 39.624 cm, but the visible width and height depend on aspect ratio.
Why diagonal size is not width
A laptop advertised as 13.3, 14, 15.6, or 17.3 inches is measured from one corner of the display area to the opposite corner. Use the screen size converter when you need estimated width and height for sleeves, stands, or desk fit.
Related measurement tools
Frequently asked questions
How many cm is a 15.6-inch laptop screen?
A 15.6-inch laptop screen has a diagonal of exactly 39.624 cm.
Is laptop screen size the width?
No. Laptop screen size is normally the diagonal measurement, not the width.