Image Aspect Ratio Calculator
Calculate responsive 16:9, 4:3, 1:1, 21:9 image dimensions or custom aspect ratios for web graphics.
📖 Detailed Guide & Use Cases
Calculate proportional image and video dimensions based on standard aspect ratios (16:9 widescreen, 4:3 classic, 1:1 square, 21:9 ultrawide, 9:16 vertical stories).
❓ Frequently Asked Questions (FAQ)
Standard YouTube widescreen video uses 16:9, whereas Instagram Reels and TikTok videos use 9:16.
Yes, enter any custom original width:height ratio to compute missing dimension variables.