What width is 1920 tall at 16:9?

1920 x 16 / 9 = 3413px. Use aspect-ratio: 16 / 9.

How to keep 1920 tall from stretching?

Set height: 1920px paired with the computed width, and aspect-ratio: W / H on the container; use object-fit for inner media.

1920 at this size works vertical or horizontal depending on ratio - check the table for portrait inversions like 9:16.

A 1920px-tall frame is used in many layouts. The table below lists the exact partner width at every ratio RatioCalc supports.

Ratio	Width for 1920	Pair	CSS
16:9	3413px	3413x1920	aspect-ratio: 16 / 9
4:3	2560px	2560x1920	aspect-ratio: 4 / 3
1:1	1920px	1920x1920	aspect-ratio: 1 / 1
9:16	1080px	1080x1920	aspect-ratio: 9 / 16
21:9	4480px	4480x1920	aspect-ratio: 21 / 9
3:2	2880px	2880x1920	aspect-ratio: 3 / 2
16:10	3072px	3072x1920	aspect-ratio: 16 / 10
4:5	1536px	1536x1920	aspect-ratio: 4 / 5
2:1	3840px	3840x1920	aspect-ratio: 2 / 1
239:100	4589px	4589x1920	aspect-ratio: 239 / 100
32:9	6827px	6827x1920	aspect-ratio: 32 / 9
5:4	2400px	2400x1920	aspect-ratio: 5 / 4
2:3	1280px	1280x1920	aspect-ratio: 2 / 3
18:9	3840px	3840x1920	aspect-ratio: 18 / 9
5:3	3200px	3200x1920	aspect-ratio: 5 / 3
1:2	960px	960x1920	aspect-ratio: 1 / 2

width = 1920 x rw / rh

// e.g. 9:16 at 1920 tall is 1080px

Vertical video at 1920 tall is 9:16 - 1080 wide; pair with aspect-ratio: 9 / 16.
Portrait feed at 1920 tall is 4:5 - 1536 wide.
Widescreen at 1920 tall is 16:9 - 3413 wide.

Print tip: at 1920px, verify with w = 1920 x rw / rh before print - 1px matters on narrow banners.