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Aspect Ratio Calculator
Popular
Calculate image & video aspect ratios
Aspect Ratio Calculator
Calculate dimensions and find aspect ratios
Original Size (Ratio)
:
Ratio: 1.778
New Size
:
1920 x 1080
Online Aspect Ratio Calculator
Easily calculate aspect ratios and resize dimensions for images, video, and screens. This tool helps designers and developers determine the correct width or height to maintain a specific aspect ratio.
Common Aspect Ratios
- 16:9: Standard HD video (YouTube, TV) - 1920x1080, 1280x720.
- 4:3: Standard definition TV and old monitors - 1024x768, 800x600.
- 1:1: Square for Instagram and social media avatars.
- 9:16: Vertical video for TikTok, Instagram Stories, YouTube Shorts.
- 21:9: Ultrawide monitors and cinematic film.
How to use
Simply enter the original width and height (or select a preset ratio). Then enter one dimension (width or height) for the new size, and the tool will automatically calculate the other dimension to match the ratio.
Frequently Asked Questions
What is aspect ratio?
Aspect ratio is the proportional relationship between the width and height of an image or screen. It is usually expressed as two numbers separated by a colon, like 16:9.