Bee Hive
Aspect Ratio Calculator
Calculate and convert aspect ratios for images and video.
About Aspect Ratio Calculator
Frequently Asked Questions
What is an aspect ratio?
An aspect ratio describes the proportional relationship between width and height, expressed as two numbers like 16:9 (16 units wide for every 9 units tall).
Why is 16:9 so common?
16:9 became the standard for HD video and modern monitors/TVs. It balances widescreen viewing with practical screen manufacturing and content production.
What's the best ratio for social media?
It varies: 1:1 for Instagram feed, 4:5 for Instagram portrait, 9:16 for Stories/TikTok/Reels, 16:9 for YouTube. Check current platform guidelines.
How do I maintain ratio when resizing?
Enable 'Lock aspect ratio', then change either width or height. The other dimension automatically adjusts to maintain the proportional relationship.
What does the GCD calculation do?
Greatest Common Divisor simplifies ratios. For example, 1920×1080 simplifies to 16:9 because both numbers are divided by their GCD (120).
Which ratio is best for printing photos?
3:2 matches most camera sensors and prints well at standard sizes (4×6, 8×12). 4:3 works well for 8×10 prints.
What is 21:9 used for?
21:9 is ultrawide format, popular for gaming monitors and cinematic content. It provides immersive wide views for both entertainment and productivity.
How do I calculate new dimensions?
Use the Resize Calculator. Enter your desired new width, and it automatically calculates the height needed to maintain your current aspect ratio.
Does aspect ratio affect file size?
Not directly – file size depends on total pixels (resolution), compression, and format. The same ratio at higher resolution means larger files.
What's the Cinema 2.39:1 ratio?
2.39:1 (sometimes called 2.40:1) is the widescreen cinematic format used in Hollywood films. It creates a dramatic, immersive letterbox appearance.