Aspect Ratio Calculator
Calculate proportional dimensions, simplify aspect ratios, and resize images
Aspect Ratio Calculator
Proportional Resizing Formula
W₁
px
H₁
px
Simplified Ratio: 16:9
=
Proportional
W₂
px
H₂
px
Calculated Dimension: 1280 × 720 px
Visual Proportion Preview (16:9)
16:9
1280 × 720
What is an Aspect Ratio?
An aspect ratio represents the proportional relationship between an image or display screen width and height, written as two numbers separated by a colon (Width:Height). Maintaining proper aspect ratios ensures graphics and videos do not stretch or distort during responsive scaling.
Popular Aspect Ratios
- 16:9: Standard widescreen ratio for YouTube, television broadcasts, and computer monitors (1920×1080, 2560×1440, 3840×2160).
- 9:16: Full-screen vertical format for TikTok, Instagram Stories/Reels, and YouTube Shorts (1080×1920).
- 1:1: Classic square format for Instagram feed posts and profile avatars (1080×1080).
- 4:5: Instagram vertical portrait feed post ratio (1080×1350).
- 21:9: Ultrawide panoramic cinema ratio (2560×1080, 3440×1440).