Aspect Ratio Calculator
Calculate image dimensions while maintaining aspect ratio. Resize without distortion.
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How to Use Aspect Ratio Calculator
- Enter your original width and height
- The aspect ratio is calculated automatically (e.g., 16:9)
- Enter a new width OR height to calculate the other dimension
- Use presets for common ratios (16:9, 4:3, 1:1, etc.)
About Aspect Ratio Calculator
Calculate new image dimensions while preserving the original aspect ratio. Enter a new width to auto-calculate height, or vice versa. Includes common aspect ratio presets for video, photos, and screens.
Frequently Asked Questions
What's the most common video aspect ratio?
16:9 is the standard for HD video, YouTube, and most modern screens. 4:3 is the older TV format.
What ratio should I use for Instagram?
1:1 (square), 4:5 (portrait), or 1.91:1 (landscape) work best on Instagram.
How do I reduce an image to a specific file size?
This tool calculates dimensions, not file size. Reducing dimensions will reduce file size, but compression settings matter too.