AmberPic

Aspect Ratio Calculator

Aspect Ratio Calculator by AmberPic processes your images directly in your browser. Calculate and crop to any aspect ratio: 1:1, 4:3, 16:9, 3:2, 21:9, or custom. No upload, no signup, instant results. Works with every modern format and produces output optimized for web, email, or social media.

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This tool is under development. In the meantime, try our other available tools.

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Features

  • ✓ Calculate aspect ratios for any image
  • ✓ Crop to common ratios: 1:1, 4:3, 16:9, 3:2, 21:9
  • ✓ Custom ratio support
  • ✓ Visual preview of the cropped result
  • ✓ Help for photographers and designers

How to use

  1. 1
    Upload an image Drop any image to see its current aspect ratio.
  2. 2
    Choose target ratio Pick from common ratios or enter a custom one (e.g., 5:4, 2.39:1 for cinema).
  3. 3
    Preview and crop See exactly how the image will be cropped. Adjust the position to keep the most important content.
  4. 4
    Download Save the image with the new aspect ratio.

Common use cases

  • → Prepare images for video and widescreen displays
  • → Crop photos for print at specific dimensions
  • → Standardize image dimensions across a project

Frequently asked questions

What is aspect ratio?

Aspect ratio is the proportional relationship between an image's width and height, expressed as two numbers separated by a colon (e.g., 16:9). It determines the shape of the image without specifying exact dimensions.

What's the difference between 16:9 and 4:3?

16:9 is widescreen (used for TVs, YouTube, modern displays). 4:3 is traditional (used for older TVs, some digital cameras, iPads in landscape).

Will cropping to a new ratio lose image content?

Yes, if the target ratio is different from the original, some content will be cut off. Position the crop to keep the most important parts.

Related tools

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Social Media Crop

Crop images to exact dimensions for Instagram, Facebook, Twitter, LinkedIn, YouTube, Pinterest, TikTok.

Image Resizer

Resize images by pixels, percentage, or preset dimensions. Lock aspect ratio.

Privacy guaranteed

  • ✓ Zero uploads — your files never leave your device
  • ✓ No signup, no watermark, no limits
  • ✓ Works offline once loaded