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Free Aspect Ratio Calculator

Calculate missing width or height from an aspect ratio. Supports common ratios like 16:9, 4:3, and 1:1. Shows the CSS aspect-ratio value.

  • 100% client-side - your data never leaves your browser.
16:9
Aspect Ratio
1.7778
Decimal Ratio
16 / 9
CSS aspect-ratio
aspect-ratio: 16 / 9;