Measure distances on screen in pixels, centimeters, or inches
Free online pixel ruler. Click two points on the canvas to measure the straight-line distance in pixels, centimeters, or inches. Adjustable DPI setting for accurate physical measurements. Visual measurement line with distance label. Perfect for web designers, UI/UX designers, and developers who need to measure screen distances without installing software.
Designers and developers frequently need to measure distances on screen — spacing between UI elements, dimensions of components, or distances in design mockups. A pixel ruler lets you do this directly in the browser without opening Photoshop, Figma, or browser DevTools. It's especially useful for quick measurements during design reviews, checking spacing consistency, and verifying that implementations match design specifications.
DPI (dots per inch) varies by monitor. Standard monitors: 96 DPI. MacBook Retina: 144-227 DPI. 4K monitors: 163-218 DPI. To find your exact DPI: search '[your monitor model] DPI' or use a DPI calculator with your screen resolution and physical size. Common values: 96 DPI (standard 1080p), 144 DPI (1.5x scaling), 192 DPI (2x/Retina). Setting the correct DPI ensures accurate cm and inch measurements.
Pixel Ruler Online Free is useful when you need to complete a focused task quickly without installing desktop software, creating another account, or switching into a heavy workflow. It works well for quick checks, conversions, previews, cleanups, generation tasks, and everyday operations where speed and consistency matter. Free online pixel ruler. Click two points on the canvas to measure the straight-line distance in pixels, centimeters, or inches. Adjustable DPI setting for accurate physical measurements. Visual measurement line with distance label. Perfect for web designers, UI/UX designers, and developers who need to measure screen distances without installing software.
Start with a small sample so you understand how Pixel Ruler Online Free handles your input, then apply it to the full task. Review the important fields, copy or export the result, and test it in the place where you plan to use it. This keeps the tool fast while still giving you a practical quality-control step before production use.
Before using the output, check formatting, special characters, line breaks, file names, URLs, units, numbers, and mobile display when relevant. If the result affects SEO, code, design, business documents, analytics, or customer-facing material, compare it against your original requirement and fix any context-specific detail before publishing.
Manual work is fine for one-off tasks, but repeated manual formatting or checking is slow and easy to make inconsistent. Pixel Ruler Online Free helps standardize the process, reduce copy-paste mistakes, and produce a cleaner starting point so you can spend more time on review, judgment, and improvement.
Accuracy depends on your screen's DPI. Set the correct DPI value for your monitor for accurate physical measurements.
Search 'screen DPI' + your monitor model, or use a DPI calculator with your screen resolution and physical size. Common values: 96 DPI (standard), 144 DPI (1.5x), 192 DPI (2x/Retina).
Yes. Click any two points on the canvas and the tool calculates the straight-line (Euclidean) distance between them, including diagonals.
The canvas is fixed at 700×400px for consistent measurements. For full-screen measurement, use a browser extension like Page Ruler Redux.
This tool measures distances within its own canvas area. To measure actual webpage elements, use browser DevTools (F12 → Elements → Box Model) or a screen ruler extension.
Yes. Pixel Ruler Online Free is designed as a free browser-based utility for quick personal, learning, and professional workflows.
No. You can use Pixel Ruler Online Free directly in a modern browser such as Chrome, Edge, Safari, or Firefox.
Yes. The page is responsive and can be used on phones and tablets, although desktop is usually more comfortable for long input or repeated copy operations.
Use clean input, test with a small sample first, review the output carefully, and adjust any details that depend on your final use case.
In most cases, yes. You can use the generated or processed output in personal and commercial projects, but legal, financial, medical, or security-sensitive work should still be reviewed by a qualified person.
The tool is built for quick browser workflows. You should still avoid entering highly sensitive data unless the specific tool clearly states how the data is handled.
Many tools include copy or download actions. If a dedicated export is not available, you can usually copy the visible result manually.
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