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Aspect Ratio Calculator

Calculate aspect ratios, resize dimensions while maintaining proportions, or find dimensions from a ratio.

16:9
200 x 113
16:9
Decimal:1.778
Dimensions:1920 x 1080
Width:
Height:

What is Aspect Ratio?

Aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It's expressed as two numbers separated by a colon (e.g., 16:9).

Common Aspect Ratios

  • 16:9 - Standard widescreen for TVs, monitors, and YouTube videos
  • 4:3 - Traditional TV and older computer monitors
  • 1:1 - Square format, popular for Instagram posts
  • 21:9 - Ultrawide monitors and cinematic films
  • 9:16 - Vertical video for TikTok, Instagram Stories, and Reels
  • 3:2 - Common in photography (35mm film)

How to Use This Calculator

  1. Enter your width and height dimensions
  2. The calculator automatically shows the simplified ratio
  3. Use the lock button to maintain the ratio while changing dimensions
  4. Click preset buttons to apply common ratios