Aspect Ratio Calculator

Calculate pixel dimensions for screens, video, and photography while preserving proportional aspect ratios.

Base Ratio (Width : Height)
:
Target Pixel Dimensions
Width (px)
×
Height (px)
Proportional Visual Frame
1920 × 1080 (16:9)
CSS Aspect-Ratio Code Snippet:
aspect-ratio: 16 / 9;

Standard Aspect Ratios in Modern Media

16:9 (1.78:1) Universal standard for Full HD (1920x1080), 4K UHD (3840x2160), YouTube videos, and modern monitors.
9:16 (0.56:1) Vertical video standard for Instagram Reels, TikTok, YouTube Shorts, and smartphone content.
4:3 (1.33:1) Classic television, iPad displays, and standard Medium format photography.
1:1 (1.00:1) Square format standard for social media profile icons, Instagram square grid posts, and product photos.
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We strive for 100% mathematical precision. If you encounter an unexpected calculation result, broken input, or unclear explanation on Aspect Ratio Calculator, please let our editorial team know.

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✓ Verified & Peer Reviewed
Reviewed for accuracy: October 2026 by Ratio Calculator Mathematical Review Team • Topic: Aspect Ratio & Screen Geometry