Image Size Calculator
Professional Image Size Calculator
Calculate optimal image dimensions for web, mobile, and print applications. Perfect for developers and designers working with responsive images.
Image Size Calculator
Calculate dimensions, aspect ratios, and file sizes
Results
Original Aspect Ratio:
16:9
New Dimensions:
- x -
Scale Factor:
-
Aspect Ratio Results
Aspect Ratio:
16:9
Decimal Ratio:
1.778
Common Use:
HD Video
File Size Results
Uncompressed Size:
6.22 MB
Estimated File Size:
300 KB
Compression Ratio:
20:1
Common Image Sizes
Full HD
1920 × 1080
HD
1280 × 720
Standard
800 × 600
Facebook
1200 × 630
Twitter
1024 × 512
Instagram
1080 × 1080
Complete Guide to Image Sizing
Responsive Images
Use the HTML srcset attribute to serve different image sizes based on device capabilities and screen densities.
<img src="image-800.jpg"
srcset="image-400.jpg 400w,
image-800.jpg 800w,
image-1200.jpg 1200w"
sizes="(max-width: 600px) 400px,
(max-width: 1000px) 800px,
1200px">Optimization Tips
- Choose the right format: JPEG for photos, PNG for graphics, WebP for modern browsers
- Compress wisely: Balance file size with image quality
- Consider screen density: Provide 2x images for high-DPI displays
- Use lazy loading: Load images only when needed
Common Aspect Ratios
16:9 - Widescreen (HD video, modern monitors)
4:3 - Traditional (older monitors, tablets)
1:1 - Square (social media posts)
3:2 - Photography (35mm film standard)
21:9 - Ultrawide (cinema, gaming)
Web Performance
Image optimization is crucial for web performance. Consider these factors:
- File size: Aim for under 100KB for critical images
- Format selection: WebP can reduce file size by 25-35%
- Compression: Use quality settings of 80-85% for JPEG
- Delivery: Use CDN for faster loading