Measure anything on your screen in pixels, centimetres, inches or millimetres. Drag to measure, adjustable DPI — no download needed.
Click "Auto" to detect your screen DPI, or enter it manually for accurate cm/mm/inch measurements.
Click and drag anywhere on the ruler to create a measurement range. The exact size is shown live.
Toggle between PX, CM, MM and IN anytime. Flip to Vertical for height measurements.
Click "Auto" to detect your screen DPI automatically, or enter it manually to ensure highly accurate physical measurements.
Click and drag anywhere inside the ruler canvas to create a measurement range. The exact dimensions update live.
Toggle between Pixels (PX), Centimeters (CM), Millimeters (MM), and Inches (IN). Flip to vertical mode for height tracking.
Developers and designers often need to verify element dimensions, margins, or padding directly on a live webpage without opening heavy inspection tools. Our online screen ruler provides a fast, lightweight alternative. Whether you are checking CSS box models or verifying UI element alignment, you can instantly read dimensions in pixels with high precision.
Need to measure a physical object using your screen? By using our Auto-DPI calibration, the tool adjusts to your screen's specific hardware density. This ensures that when you switch to centimeters, inches, or millimeters, the output corresponds to real-world measurements, making this a highly versatile digital ruler for quick physical tasks.
This utility is completely browser-based. There are no background applications to install and no tracking software hidden within the code. Every calculation executes locally on your hardware, ensuring that your workflow and screen data remain private. Get reliable measurement results for free with no registration required and no downloads necessary.
ToolTiny provides an actual size ruler online that can display measurements in centimeters, millimeters, inches, and pixels. By setting the correct DPI, the ruler matches real-world dimensions on your screen.
This makes it useful for measuring small physical objects, printed materials, and screen elements without installing any software.
This virtual ruler works directly in your browser and supports desktop computers, laptops, tablets, and smartphones.
Whether you use Windows, macOS, Linux, Android, or iPhone, the ruler adapts to your screen and provides accurate measurements after calibration.
As a professional pixel measurement tool, this ruler helps web designers and front-end developers verify spacing, alignment, margins, and element sizes directly on screen.
It is especially useful for responsive design testing, UI reviews, and layout validation without opening additional software.
Need to measure a screen element quickly? This online measuring tool lets you drag across any visible area and instantly read the size in pixels, centimeters, millimeters, or inches.
The tool is ideal for measuring images, UI components, documents, screenshots, and presentation slides displayed on your monitor.
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