What is the difference between the simplified ratio and the decimal ratio?

The simplified ratio (e.g. 16:9) expresses the relationship as the smallest whole numbers that maintain the proportion, calculated using the Greatest Common Divisor (GCD). The decimal ratio (e.g. 1.78:1) divides the width by the height to give a single decimal number, which is useful for precise comparisons and calculations. Both express the same proportion.

How is the simplified aspect ratio calculated?

The tool finds the Greatest Common Divisor (GCD) of the pixel width and height, then divides both values by it. For example, a 2172×724 image: GCD(2172, 724) = 724, so 2172÷724 = 3 and 724÷724 = 1, giving a ratio of 3:1. A 1920×1080 image: GCD(1920, 1080) = 120, giving 16:9.

What image formats are supported?

Any format your browser can decode: JPG/JPEG, PNG, WebP, GIF, HEIC, HEIF, TIFF, BMP, AVIF, SVG, and ICO. EXIF metadata availability depends on the format — JPEGs typically contain the richest EXIF data (camera settings, GPS, dates), while PNG and WebP may contain ICC color profile data but fewer EXIF fields.

Why is my aspect ratio shown as large numbers like 938:1677 instead of a common ratio?

This happens when the image dimensions share no common factors other than 1 (i.e. the GCD is 1), meaning no simpler whole-number ratio exists. For example, 938 and 1677 share no common divisor, so the ratio stays 938:1677. The decimal ratio (0.56:1) is more readable in these cases. Common ratios like 16:9 only appear when the dimensions are exact multiples of those numbers.

Are my images uploaded to a server?

No. All processing happens 100% in your browser. The Canvas API reads the image dimensions locally, and the exifr JavaScript library parses the EXIF metadata client-side. Your image files never leave your device and are never sent to any server.

Why doesn't my image show any EXIF metadata?

Many images have no embedded EXIF data. Screenshots, images exported from design tools, WebP images downloaded from the web, and images processed by apps that strip metadata (e.g. WhatsApp, Twitter) typically contain no EXIF fields. The tool will still correctly show the aspect ratio, dimensions, file size, and MIME type even without EXIF data.

What common aspect ratios are used for social media and video?

16:9 (1920×1080, 1280×720) is standard for YouTube, landscape video, and desktop wallpapers. 9:16 (1080×1920) is used for TikTok, Instagram Stories, and Reels. 1:1 (square) is used for Instagram feed posts. 4:3 is used for traditional photos and presentations. 4:5 (1080×1350) is the portrait format for Instagram feed. 3:2 is standard for DSLR photos. 2:1 is used for Twitter header images.

How accurate is the aspect ratio calculation?

The calculation is mathematically exact — it uses integer arithmetic (GCD) on the true pixel dimensions read directly from the image. There is no approximation or rounding. The decimal ratio is rounded to 2 decimal places for readability.

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Image Aspect Ratio Finder

Instantly find the exact aspect ratio of any image — free, private, and no upload required. Upload a JPG, PNG, WebP, HEIC, TIFF, GIF, BMP, or AVIF file and the tool immediately shows two ratio formats: the simplified whole-number ratio (e.g. 16:9, 4:3, 3:1) calculated using the Greatest Common Divisor algorithm, and the decimal ratio (e.g. 0.56:1). It also reveals the full image metadata organized into clear sections — File Information (name, exact file size in bytes/KB/MB, MIME type, extension), Image Properties (both ratio formats, pixel width and height, total image size, megapixels), Date & Time (EXIF capture date, modification date, ICC profile date), Software & Processing (camera software, profile version), Metadata & Description (ICC profile description and copyright), Technical Details (color space, ICC profile class, rendering intent, matrix columns, tone reproduction curves), Camera Settings (make, model, lens), Exposure & Optics (shutter speed, aperture, ISO, focal length, flash), GPS coordinates, and all other embedded metadata. All processing runs in your browser using the HTML Canvas API and the exifr library — your image files never leave your device.

Updated June 2026

1Upload your image or enter dimensions
2View the calculated ratio

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JPG, PNG, WebP, HEIC, TIFF, GIF, BMP, AVIF and more

How to use Image Aspect Ratio Finder

1
Upload your image or enter dimensions
Drag and drop an image, or type its width and height directly.
2
View the calculated ratio
The tool instantly shows the simplified aspect ratio (e.g. 16:9) plus common matching resolutions.

Frequently asked questions

Everything you need to know about image aspect ratio finder.

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, 4:3, 1:1, 3:2). It describes the shape of the image regardless of its actual size in pixels or physical dimensions. For example, a 1920×1080 image and a 1280×720 image both have an aspect ratio of 16:9.

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How to use Image Aspect Ratio Finder

Upload your image or enter dimensions

View the calculated ratio

Frequently asked questions

−What is an aspect ratio?

+What is the difference between the simplified ratio and the decimal ratio?

+How is the simplified aspect ratio calculated?

+What image formats are supported?

+What metadata does the tool show?

+Why is my aspect ratio shown as large numbers like 938:1677 instead of a common ratio?

+Are my images uploaded to a server?

+Why doesn't my image show any EXIF metadata?

+What common aspect ratios are used for social media and video?

+How accurate is the aspect ratio calculation?

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