Screen Ruler
On-screen measurement tool with rulers in centimeters, millimeters, inches, and feet. Calibrate to your display.
How to use
• Find an object with known dimensions (credit card is 85.6mm wide, recommended) • Hold the object against the colored calibration bar on your screen • Enter the exact size of your reference object in the input field • Select the correct unit (millimeters, centimeters, or inches) • Click "Calibrate" button to set up your screen's measurement ratio Once calibrated: • Click unit tabs (Centimeters, Millimeters, Inches, Meters, Feet) to switch between different rulers • Use the displayed ruler to measure anything on your screen accurately • Check screen information section for your display's resolution and DPI Important notes: • Keep your browser zoom at 100% for accurate measurements • Use a flat, rigid object for calibration reference • The tool calculates your screen's pixel density to provide precise measurements • Longer reference objects provide better accuracy This tool helps designers, developers, and anyone measure on-screen elements without a physical ruler.
Reviews
No written reviews yet. Be the first!
More from Tools
Can't decide what to eat? Filter by meal type, cuisine, effort level, and dietary preference, then let the app pick for you. 45+ meals with a slot machine reveal.
by Launch Arcade
