Aspect Ratio Calculator

Calculate and convert aspect ratios.

Dimensions

Change either side and the other follows the ratio.

Width (px)

Height (px)

16:9

Ratio16:9

Decimal1.7778

Percentage (h ÷ w)56.250%

Pixels1920 × 1080 (2.07 MP)

Detected from pixels16:9

CSS aspect-ratio

aspect-ratio: 16 / 9;

Padding-top hack

.wrapper { position: relative; padding-top: 56.250%; }

Tailwind

class="aspect-[16/9]"

ffmpeg scale

ffmpeg -i in.mp4 -vf "scale=1920:1080" out.mp4

320px wide320 × 180

640px wide640 × 360

1280px wide1280 × 720

1920px wide1920 × 1080

2560px wide2560 × 1440

3840px wide3840 × 2160

16:9HD video, most screens

4:3Classic displays, iPad

21:9Ultrawide, cinema

1:1Square, avatars

9:16Stories, Reels, Shorts

3:2Photography

2:1Panoramas

1.91:1Open Graph images

goldenGolden ratio