What is the aspect ratio of smartphone screens?
Most modern smartphones shoot vertical videos in 9:16 (1080x1920).
How to Use Aspect Ratio Calculator
Step 1: Select Ratio
Pick a common ratio (16:9, 4:3, 1:1, 9:16, 21:9) or enter custom proportions.
Step 2: Enter Width or Height
Type any width or height; the other dimension calculates automatically.
Step 3: Copy Dimensions
Copy the calculated pixel dimensions or CSS properties.
Key Features & Capabilities
- Live bi-directional dimension scaling
- Visual aspect ratio rectangle preview
- Pre-loaded with modern display standards (Full HD 1080p, 4K UHD, Instagram Stories, Ultrawide)
Specifications & Limits
- Batch Processing: Single Item
- Free Tier Limit: Unlimited ratio calculations
Frequently Asked Questions
How does the calculation maintain aspect ratio?
The formula uses cross-multiplication: New Height = (Original Height / Original Width) * New Width.
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