Aspect Ratio Calculator

Set a ratio, then type a width or a height — the other one solves automatically.

Ratio width

Ratio height

Width (px)

Height (px)

—

Common ratios at a glance

Ratio	Decimal	1920 px wide →	1080 px tall →	Use
1:1	1	1920 × 1920	1080 × 1080	Square
5:4	1.25	1920 × 1536	1350 × 1080	Large format
4:3	1.3333	1920 × 1440	1440 × 1080	Fullscreen / classic TV
3:2	1.5	1920 × 1280	1620 × 1080	35 mm photo
16:10	1.6	1920 × 1200	1728 × 1080	Widescreen computing
5:3	1.6667	1920 × 1152	1800 × 1080	Super 16
16:9	1.7778	1920 × 1080	1920 × 1080	HD widescreen
1.85:1	1.85	1920 × 1038	1998 × 1080	Cinema flat
1.91:1	1.91	1920 × 1005	2063 × 1080	Social link preview
2:1	2	1920 × 960	2160 × 1080	Univisium
2.35:1	2.35	1920 × 817	2538 × 1080	CinemaScope
2.39:1	2.39	1920 × 803	2581 × 1080	Anamorphic widescreen
21:9	2.3333	1920 × 823	2520 × 1080	Ultrawide
32:9	3.5556	1920 × 540	3840 × 1080	Super ultrawide
4:5	0.8	1920 × 2400	864 × 1080	Portrait social
3:4	0.75	1920 × 2560	810 × 1080	Portrait classic
2:3	0.6667	1920 × 2880	720 × 1080	Portrait photo
9:16	0.5625	1920 × 3413	608 × 1080	Vertical video
9:18	0.5	1920 × 3840	540 × 1080	Tall phone (2:1)
9:19.5	0.4615	1920 × 4160	498 × 1080	Modern iPhone
9:20	0.45	1920 × 4267	486 × 1080	Tall Android
9:21	0.4286	1920 × 4480	463 × 1080	Extra tall phone

Questions

How does the aspect ratio calculator work?

Enter a ratio and one dimension. The missing dimension is width × ratio-height ÷ ratio-width (or the inverse). Enter a width and height instead and it reduces them to the smallest whole-number ratio using the greatest common divisor.

How do I resize an image without distorting it?

Keep the ratio fixed and change only one dimension — let the calculator solve the other. Any pair produced this way scales the image without stretching.

What does the decimal value mean?

Width divided by height. 16:9 is 1.7778, 4:3 is 1.3333, 1:1 is 1.0. Anything below 1.0 is portrait.