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Utility · Measurement
Screen Ruler
Measure anything on your screen with professional sub-pixel precision.
Select Units
Calibration (DPI)
PPI
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X: 0, Y: 0
Frequently Asked Questions
Is this ruler browser-accurate?expand_more
Yes, the tool utilizes the browser's native window dimensions and viewport scaling to ensure 1:1 pixel accuracy for web elements.
How do I measure outside the browser?expand_more
Due to browser security protocols, web-based tools cannot measure outside the window. We recommend maximizing your browser window for the largest measuring surface.
What is DPI/PPI and why does it matter?expand_more
DPI (Dots Per Inch) determines how many pixels fit into a physical inch on your monitor. Our tool auto-calculates this based on your screen hardware to provide accurate physical measurements (cm/in).