Screen Scale & Ruler

Measure real-world sizes on your screen. Calibrate for accurate measurements.

Unit

Screen DPI

Quick Presets

Current DPI: 96 | 1 cm = 37.80 pixels

US Quarter (24.26mm)

1 inch square

USB-A (12mm width)

Convert length, weight, temperature, and more

Convert colors and create CSS gradients

Convert between binary, decimal, hex, octal