Aspect Ratio Calculator
Aspect Ratio
—
Simplified
—
Resized Dimensions
—
Understanding Aspect Ratios
An aspect ratio is the proportional relationship between width and height. Common ratios include 16:9 (HD video), 4:3 (iPad), 3:2 (DSLR photos), 1:1 (Instagram square).
When resizing, maintaining aspect ratio prevents distortion. Enter a new width or height and the calculator finds the proportional counterpart.
Social media platforms have preferred ratios: Instagram 1:1 or 4:5, YouTube 16:9, TikTok 9:16. Knowing the correct ratio prevents unwanted cropping.
Frequently Asked Questions
What is the most common video aspect ratio?
16:9 is standard for HD (1280x720), Full HD (1920x1080), and 4K (3840x2160).
How do I calculate aspect ratio?
Divide both width and height by their greatest common divisor (GCD). For 1920x1080: GCD is 120, giving 16:9.
What aspect ratio for social media?
Instagram: 1:1 or 4:5 posts, 9:16 stories. Facebook: 1.91:1 link images. Twitter: 16:9. TikTok: 9:16.
Resolution vs aspect ratio?
Resolution is total pixel count (1920x1080). Aspect ratio is the shape (16:9). Multiple resolutions can share the same ratio.