Size comparison

Compare Sizes

Compare paper, platform, print, screen, and image presets side by side using clean fragment state such as #a=paper.a4&b=paper.us-letter.

Last checked: 2026-05-01

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Tool summary

Choose two presets to compare dimensions, area difference, and aspect ratio. Shared links can remember the selected presets.

Last checked: 2026-05-01 Source: W3C CSS Values and Units Module Found a spec change? Send correction.

Interactive tool

Compare Sizes

Compare two PixelMeasures presets side by side to understand dimensions, area difference, and aspect ratio mismatch.

Search presets Preset A Preset B / target

Formula area difference = (area A - area B) / area B x 100

Preset	Dimensions	Use
A4 at 300 DPI	2480 x 3508 px	print comparison
YouTube thumbnail	1280 x 720 px	digital comparison

JavaScript is required for live calculations and local image export. The formula and examples above remain available so you can use the values in another editor.

Workflow

Use Compare Sizes in your sizing workflow

Compare two PixelMeasures presets side by side to understand dimensions, area difference, and aspect ratio mismatch.

InputTwo size presets

OutputComparison summary

Best beforeCanvas setup or export

StateBrowser-based calculation

Use Compare Sizes when you need to decide between formats, check whether one design can be adapted to another, or explain the difference between similar sizes. Selected presets can be shared in the URL fragment for quick side-by-side review.

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Nearby tools

More tools in the PixelMeasures toolkit

Aspect Ratio Calculator Calculate aspect ratio from width and height, including reduced ratio and decimal value for images, videos, banners, and canvases. DPI Calculator Calculate DPI or PPI from physical size and pixel width to check print sharpness, canvas setup, and image export quality. Image Resizer Resize an image locally in the browser using custom pixel dimensions or PixelMeasures presets for platforms, print, and design exports. MM to Pixels Convert millimeters to pixels at any DPI or PPI for print artwork, paper sizes, labels, stickers, and layout exports. Pixels to CM Convert pixels to centimeters using any DPI or PPI to estimate print dimensions and physical output size. Pixels to Inches Convert pixels to inches at any DPI or PPI to estimate print size, output dimensions, and image sharpness. Print Bleed Calculator Calculate print bleed size from trim width, trim height, bleed per side, and DPI for print-ready canvas setup. Social Media Image Resizer Resize images to social media presets for covers, thumbnails, stories, pins, banners, shop assets, and profile graphics.

FAQ

Common questions

What can I compare?

You can compare PixelMeasures presets that include dimensions, such as paper sizes, platform assets, print formats, photo sizes, and screen sizes.

Why use a fragment URL?

Fragments let the tool remember selected presets without creating duplicate indexable URLs for every possible combination.

Can I share selected tool settings?

Some PixelMeasures tools keep selected presets in the URL fragment, so a shared link can reopen useful choices while the main tool page stays focused.

References

Sources and references

Aspect-ratio results are pure geometry based on the entered width and height; W3C CSS unit references support how dimensions are represented in web layouts.

W3C CSS Values and Units Module
Used for CSS unit definitions, absolute unit relationships, and CSS px behavior.

Last checked: 2026-05-01