Aspect Ratio Calculator

What this calculator does

The Aspect Ratio Calculator reduces dimensions to their simplest ratio, shows whether the source is landscape, portrait, or square, and helps you project new sizes without distorting the original shape.

Fit and fill scaling

When you provide a target width and height, the tool calculates both a contain result and a fill result. Contain keeps the full source visible inside the frame, while fill covers the frame completely and may crop part of the source.

Common use cases

• Preparing images for websites, hero banners, and thumbnails.
• Checking social media crop sizes before exporting artwork.
• Matching video edits to widescreen, vertical, or square formats.
• Planning responsive embeds, screenshots, and presentation assets.

Important limitations

The calculator works from the numeric dimensions you enter. It does not inspect real image files, DPI metadata, or safe areas, so always confirm platform-specific export rules before publishing final assets.