13-Inch Laptop Dimensions: 30.4 × 21.5 cm (12 × 8.5 in)

Compared with things you know

About 3.5 times as wide as a credit card (8.56 cm)
About 1.3 times as wide as a basketball (24 cm)
About 17% of the length of an adult bicycle (1.75 m)

13-inch laptop 30 cm
Credit card 8.56 cm
Basketball 24 cm

Drawn to scale: Credit card, 8.56 cm wide · Basketball, 24 cm across · 13-inch laptop, 30 cm wide

13-inch laptop dimensions

Measurement	Metric	Imperial	Source
Width	30.41 cm	11.97 in	^[1]
Depth	21.5 cm	8.465 in	^[1]
Height (closed)	1.13 cm11.3 mm	0.44 in	^[1]
Screen diagonal	34.54 cm	13.6 in	^[1]

Width of some 13-inch laptops^[1]^[2]^[3]

Apple MacBook Air 13-inch (13.6 in screen)	30.4 cm (1 ft 0 in)30.41 x 21.5 x 1.13 cm
Apple MacBook Pro 13-inch, M2, 2022 (13.3 in screen)	30.4 cm (1 ft 0 in)30.41 x 21.24 x 1.56 cm
Dell XPS 13 9310 (13.4 in screen)	29.6 cm (11.6 in)29.57 x 19.87 x 1.48 cm

Screen size vs body size

The "13 inch" in a laptop's name refers to the display, which Apple and Dell both list as a diagonal measurement. It is not the width of the machine. Real 13-inch models have diagonals of 13.3, 13.4 or 13.6 inches. The 13.6-inch MacBook Air is 30.41 cm (11.97 in) wide, 21.5 cm (8.46 in) deep and 1.13 cm (0.44 in) thick.^[1]^[2]^[3]

Examples compared

Sizes differ between models. Dell's XPS 13 9310 has a 13.4-inch display and a body 29.57 cm (11.64 in) wide and 19.87 cm (7.82 in) deep. Apple's 13-inch MacBook Pro from 2022 has a smaller 13.3-inch display, yet it is as wide as the MacBook Air at 30.41 cm, and thicker at 1.56 cm (0.61 in). These three models are all about 30 cm wide and 20 to 21.5 cm deep. Check the maker's spec sheet for the exact model.^[1]^[2]^[3]

Did you know?

Apple’s 13-inch MacBook Air (M3) is 30.41 cm wide and 21.5 cm deep, but only 1.13 cm thick.

Questions people ask

How big is a 13-inch laptop in cm?

It depends on the model. The 13-inch MacBook Air is 30.41 x 21.5 x 1.13 cm (width x depth x height), and the Dell XPS 13 9310 is 29.57 x 19.87 x 1.48 cm.^[1]^[3]

How wide is a 13-inch MacBook Air in inches?

11.97 in (30.41 cm) wide, 8.46 in (21.5 cm) deep and 0.44 in (1.13 cm) thick, with a 13.6-inch screen diagonal.^[1]

Is a 13-inch laptop 13 inches wide?

No. The 13-inch figure is the screen diagonal. The two Apple models above have 13.6 and 13.3-inch displays but are both 11.97 in (30.41 cm) wide, and the Dell is 11.64 in (29.57 cm) wide.^[1]^[2]^[3]