Calculate new image dimensions from a percentage scale or target size.
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More about the Image Scale Calculator
Resizing "to 150%" and resizing "to exactly 1200 pixels wide" are two different ways of describing the same kind of change, and converting between them means working out what percentage a specific target width actually represents, then applying that same proportional scale to the height so the image doesn't stretch out of shape in one direction. This tool calculates new image dimensions from either a percentage scale or a specific target size, converting between the two while keeping the result proportional. Useful for figuring out the exact pixel dimensions a 150% scale-up actually produces, working backward from a required target width to the percentage scale that gets there, or confirming a resized image stays proportional instead of distorting in one direction.
Calculate new image dimensions from a percentage scale or target size. The Image Scale Calculator is one of 900+ free developer tools on Toolblip - all open to use without a signup.
How do I use the Image Scale Calculator?
Open the Image Scale Calculator on this page, paste or upload your input, and the result updates as you type. Use the copy button to grab the output, or adjust options to tune the result. Nothing you enter leaves your browser.
Is the Image Scale Calculator free to use?
Yes. The Image Scale Calculator is a free online tool on Toolblip - no signup, no account, no hidden usage limits. It runs in your browser and works on desktop and mobile.
Is the Image Scale Calculator safe and private?
Yes. The Image Scale Calculator processes your data entirely client-side, so nothing you paste is uploaded or stored on any server. It's safe to use with internal snippets, private keys for debugging, or any other sensitive content you'd rather not send to a remote service.
What kind of output does the Image Scale Calculator produce?
The Image Scale Calculator produces clean, formatted output that you can copy or download with a single click. The output is tailored to the tool's purpose — formatted code, converted data, transformed text, or processed media — and is ready for immediate use in your project or workflow.
Does the Image Scale Calculator work on mobile devices?
Yes. The Image Scale Calculator is designed to work on any device with a modern browser, including phones and tablets. The interface adapts to smaller screens, and the core functionality — paste input, transform, copy output — works the same way regardless of your device.
Are my images uploaded anywhere when I use the Image Scale Calculator?
No. The Image Scale Calculator processes images fully client-side using the Canvas API. Your files never leave your browser, so you can safely work with personal photos, design mockups, or confidential assets.
What image formats does the Image Scale Calculator support?
The Image Scale Calculator works with common web image formats including PNG, JPEG, WebP, GIF, and SVG. The specific operations available depend on the format — lossless formats like PNG preserve quality through transformations, while lossy formats like JPEG may show compression artefacts after re-encoding.
Can I use the Image Scale Calculator offline?
Once the page has loaded, the Image Scale Calculator continues to work without an internet connection. Bookmark this page and return to it anytime - all logic runs locally.