Aspect Ratio Calculator
Calculate, simplify, and visually preview aspect ratios for images and videos instantly.
Calculate Ratio
Common Ratios
Equivalent Dimensions
Master Your Layouts
Whether you're a designer, developer, or photographer, knowing your aspect ratio is crucial for responsive design and proper image framing. Our calculator helps you instantly find the simplified ratio from any pixel dimensions.
Visual Ratio Preview
Don't just look at numbers—see the ratio. Our tool includes a dynamic visual box that updates as you change dimensions, helping you understand how wide or tall your final output will look in real-world use.
Standard Ratios to Know
- 16:9: The standard for HD video, YouTube, and modern monitors.
- 4:3: Traditional ratio for older TVs and digital photography.
- 1:1: Perfect square used for Instagram posts and profile pictures.
- 9:16: Vertical video ratio for TikTok, Reels, and mobile stories.
Frequently Asked Questions
What is an aspect ratio?
An aspect ratio is the proportional relationship between a width and a height. It's usually expressed as two numbers separated by a colon, like 16:9 for widescreen video.
How is the simplified ratio calculated?
We use the Greatest Common Divisor (GCD) of your width and height to divide both numbers until they are in their simplest whole-number form.
What are common aspect ratios used for?
16:9 is the standard for HD video and YouTube. 4:3 is common for older TVs and digital photography. 1:1 is used for square social media posts like Instagram, and 9:16 is for vertical video like TikTok and Stories.
Can I input decimal values?
This calculator is designed for whole pixel values (integers). If you have decimal values, please round them to the nearest whole number for the most accurate simplified ratio.