Image Crop Size Calculator

Enter source dimensions and a custom or common aspect ratio to see exact centered crop geometry before opening an image editor.

Centered crop geometry

Calculate the largest crop that matches a target ratio while retaining as much source area as possible.

Source width

Source height

Target ratio W

Target ratio H

—Largest crop

—Centered X, Y

—Pixels removed

—Area retained

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Crop margins —

Inspect dimensions Aspect ratio Print size Required pixels DPI metadata Crop geometry Resize image

Proportional crop preview

—Source ratio

—Target decimal

—Area removed

—Target orientation

This is centered geometry only. It does not inspect faces, text, or the important subject in the image.

Use the connected image workflow

Optimize only when needed, set dimensions deliberately, convert or edit for a real destination, then inspect the exported result before replacing your source asset.

Browser-local limits

Canvas-based export is browser dependent. PNG is broadly available; JPEG/WebP quality and support can vary, and metadata may not be preserved through canvas re-encoding.