Aspect Ratio Calculator
Calculate and convert aspect ratios for video, images, and screens. Find width/height from ratio, resize while maintaining proportions, and compare common ratios.
Calculate and convert aspect ratios for video, images, and screens. Find dimensions that maintain proportions, and compare common ratios. All calculations happen in your browser — fast and private.
Calculate Aspect Ratio
Resize Maintaining Ratio
Common Aspect Ratios
Common Video Resolutions
- • 4K UHD: 3840 × 2160 (16:9)
- • 1080p HD: 1920 × 1080 (16:9)
- • 720p HD: 1280 × 720 (16:9)
- • Instagram Square: 1080 × 1080 (1:1)
- • Instagram Story: 1080 × 1920 (9:16)
How to Use
- Enter your current width and height to find the aspect ratio
- Use the resize tool to calculate new dimensions while keeping the ratio
- Click common ratios to apply them quickly
Frequently Asked Questions
❓ Is this tool free?
Yes! All our tools are completely free. No registration, no hidden charges, no ads. Just open and use.
🔒 Is my data safe?
Absolutely. All calculations happen in your browser. We don't store, send, or track any of your data. Everything is processed locally on your device.
📱 Can I use this on mobile?
Yes! All our tools are fully responsive and work perfectly on smartphones, tablets, and desktops.
🌐 Do I need internet?
No! Once the page loads, you can use the tool completely offline. All calculations happen in your browser without any server connection.