Free tools · Images
Aspect Ratio Calculator
Compute missing width or height for any aspect ratio (16:9, 4:3, custom). Free for video, design, and social crops.
Open the tool
Loading aspect ratio calculator…
How it works
- Pick a preset or enter a custom ratio.
- Enter width or height.
- Read the missing dimension.
FAQ
- Can I use decimals?
- Yes — ratios and dimensions accept decimals.
- Related to crop tool?
- Use this to plan sizes; use Image Crop to cut the pixels.
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