Aspect Ratio Calculator
Enter dimensions to calculate the aspect ratio. Lock the ratio to resize proportionally. Use presets for social media.
Common Ratios
Visual preview (proportional)
Social Media Presets
Common Display Resolutions
Frequently Asked Questions
What is aspect ratio?
Aspect ratio is the proportional relationship between width and height. For example, 16:9 means 16 units wide for every 9 units tall. It is the standard for HD displays, YouTube videos, and most modern screens.
What aspect ratio is 1920x1080?
1920x1080 is 16:9, the standard Full HD resolution. This ratio is used for most monitors, TVs, YouTube videos, and streaming content.
What is the best aspect ratio for social media?
Instagram feed: 1:1 (1080x1080) or 4:5 (1080x1350). Instagram/TikTok Stories: 9:16 (1080x1920). YouTube: 16:9 (1920x1080 or 2560x1440). Pinterest: 2:3 (1000x1500). Twitter: 16:9 (1200x675).
How do I resize without stretching?
Lock the aspect ratio, then change either width or height. The other dimension will auto-calculate to maintain proportions. This is what our calculator does automatically when the lock is enabled.
Is this calculator free?
Yes, 100% free with no limits. Calculate aspect ratios, resize dimensions, and use social media presets. No signup, no tracking, everything runs in your browser.
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