Layout Aspect Ratio Calculator
Calculate video aspect ratio dimensions from width or height. Convert 16:9, 4:3, 2.35:1 cinema, and vertical 9:16 for social media and broadcast formats.
Specialist tool for Layout1 executable calculation mode1 guided projectPrivate in your browser
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Inputs that matter
Width, Height
Output to expect
Aspect Ratio Calculator
How it works
1 executable calculation mode; 0 include an authored formula and the rest show an input/output summary
- Confirm that every value uses the unit and time basis shown before comparing scenarios.
- Change one input at a time to see which assumption materially changes the result.
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Reference & details
How it works
Updated July 2026
How it works
Updated July 2026Height from Width
16:9 → ratio 1.778. Width 1920 → height 1080.
Height = Width ÷ Aspect Ratio (W:H as decimal W/H)Width from Height
Vertical 9:16: height 1920 → width 1080.
Width = Height × Aspect RatioSimplify Ratio
Divide both dimensions by greatest common divisor for clean ratio notation.
GCD simplification: 1920×1080 → 16:9Updated: July 2026
Example Scenarios
3840 width → 2160 height. Standard UHD delivery for YouTube and streaming.
1080 width → 1920 height. Full vertical HD for mobile-first content.
3840 × 1607 active pixels with letterbox bars to 2160 total height.
FAQ
Standard HD and 4K video — 1920×1080, 3840×2160. Width divided by height equals 1.778 (16÷9).
9:16 is vertical (portrait) — TikTok, Reels, Shorts. 16:9 is horizontal landscape — TV and YouTube desktop.
Widescreen cinema scope. On 1920 wide frame, active picture height ≈ 817 pixels with letterboxing.
H.264 encoding prefers width and height divisible by 2 (macroblock alignment). Round calculated dimensions to nearest even integer.
Camera sensors may be 3:2 or 4:3 native — crop to target aspect in post or set recording format on camera.
About Layout Aspect Ratio Calculator
Compute video frame dimensions from any aspect ratio and one known side. Enter ratio (16:9, 4:3, 2.39:1, 9:16) plus width or height to get matching pixel dimensions for export, cropping, and social platform specs.