RESPONSIVE DESIGN & CSS

Aspect Ratio Calculator

Calculate simplified aspect ratios (16:9, 4:3, 1:1, 21:9), greatest common divisor (GCD), modern CSS aspect-ratio, and padding-top hacks.

100% Client-Side: Runs instantaneously inside your browser.

Presets:

Width (px)

Height (px)

Simplified Aspect Ratio

16:9

Decimal: 1.7778 | Padding-Top Hack: 56.25%

CSS Snippet

Visual Preview

1920 × 1080 (16:9)

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