About

Content creators and developers constantly manage visual dimensions across disparate platforms. An incorrect aspect ratio results in letterboxing (black bars), stretching, or critical content being cropped out. This calculator determines the exact pixel dimensions required to maintain a specific geometric relationship between width and height. It serves video editors conforming footage to social media standards and web designers building responsive layouts.

Standardization in digital media relies on integer ratios. While analog film used complex decimals, digital formats strictly adhere to ratios like 16:9 or 9:16. Calculating the missing dimension prevents visual distortion during resizing tasks.

Formulas

The relationship between width W, height H, and the aspect ratio r is linear.

r = WH

To solve for a missing height H₂ when resizing a width to W₂ while maintaining the ratio:

H₂ = W₂ × H₁W₁

Reference Data

Ratio	Common Use	Width (px)	Height (px)	Description
16:9	YouTube / HD TV	1920	1080	Standard Full HD
16:9	4K UHD	3840	2160	Ultra High Def
4:3	SD TV / iPad	1024	768	Classic Monitor
1:1	Instagram Feed	1080	1080	Square Format
9:16	Stories / TikTok	1080	1920	Vertical Video
21:9	Cinema / Ultrawide	2560	1080	Anamorphic/Wide
5:4	Large Format Photo	1280	1024	Print Standard
3:2	DSLR Sensors	1080	720	Classic 35mm
1.91:1	Facebook Link	1200	628	Meta Card
2:1	Univisium	2880	1440	Mobile "Long"

Frequently Asked Questions

16:9 is a widescreen format standard for modern televisions and web video. 4:3 is boxier, used in older TVs and often for photography or tablet displays.

Divide the width by the height. Then simplify the fraction by dividing both numbers by their greatest common divisor (GCD).

Ideally, no. Resizing involves changing dimensions while keeping the ratio constant. If the ratio changes, the image appears stretched or squashed.

It is an ultra-widescreen format often used in cinema and increasingly in gaming monitors to provide a wider field of view.