Aspect Ratio Calculator
Calculate pixel dimensions, simplify aspect ratios, and resize images or video without distortion. Real-time visual canvas scaling with 1-click CSS export.
Enter Dimensions or Target Ratio
aspect-ratio: 16 / 9;
Live Visual Scaling Box
16:9Scaled Resolutions
Scaled from current ratio| Scale | Resolution | Action |
|---|
How Aspect Ratio is Calculated
Aspect ratio is the proportional relationship between an image or display’s width and height. To calculate the simplified aspect ratio between a resolution like 1920×1080:
Frequently Asked Questions
What is the standard aspect ratio for YouTube and modern TV? ▼
16:9 (Widescreen) is the international standard for high-definition television, YouTube videos, computer monitors, and streaming platforms. Common resolutions include 1920×1080 (1080p FHD) and 3840×2160 (4K UHD).
What aspect ratio should I use for Instagram Reels and TikTok? ▼
Mobile-first vertical video uses 9:16 (Vertical Widescreen). The recommended full-screen resolution is 1080×1920 pixels.
How does the CSS aspect-ratio property work? ▼
The modern CSS property aspect-ratio: 16 / 9; instructs the browser to maintain the ratio automatically, preventing cumulative layout shifts (CLS) when images and video embeds load dynamically.
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