Free Online Aspect Ratio Calculator

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The Best Free Aspect Ratio Calculator

When resizing images or videos, maintaining the correct aspect ratio prevents stretching and distortion. The GadgetsFocus free online Aspect Ratio Calculator lets you enter any width or height, and it instantly calculates the other dimension based on your chosen ratio.

Common Aspect Ratios

  • 16:9: Standard widescreen for YouTube, monitors, and TV.
  • 4:3: Classic TV and presentation format.
  • 1:1: Square — Instagram posts, profile pictures.
  • 9:16: Vertical — TikTok, Instagram Reels, YouTube Shorts.
  • 21:9: Ultra-wide monitors and cinematic video.
  • 3:2: Standard DSLR photo proportions.