Aspect Ratio Calculator

Find the aspect ratio of any dimensions and scale to standard sizes. Shows ratio, closest common format, and all scaled dimensions at once.

enter width and height
Width (px)
Height (px)
Common presets

Frequently Asked Questions

What is aspect ratio?
Aspect ratio is the proportional relationship between width and height. 16:9 means for every 16 units of width there are 9 units of height. It's used in photography, video production, screen design, and print to maintain consistent proportions when resizing.
What aspect ratio should I use for YouTube?
YouTube: 16:9 (1920×1080 or 1280×720). Instagram posts: 1:1 (1080×1080) or 4:5 portrait. Instagram Stories/TikTok/Reels: 9:16 (1080×1920). Twitter/X header: ~3:1. Facebook cover: ~2.7:1. LinkedIn banner: ~8:1.
What is the 16:9 aspect ratio in pixels?
Common 16:9 resolutions: 1280×720 (720p HD), 1920×1080 (1080p Full HD), 2560×1440 (1440p QHD), 3840×2160 (4K UHD). All these are exactly 16:9 ratio.