A free on-screen ruler and a set of unit converters — no sign-up, no app, no clutter. Just the tool you came for.
Turn your screen into a real-size ruler in cm or inches. Drag to calibrate, remembers your device.
Convert between mm, cm, m, km, inches, feet, yards and miles instantly.
Quick centimeters ↔ inches conversion with a full reference chart.
Convert feet and inches back and forth, with a height-friendly chart.
Centimeters to feet conversion, handy for heights and room dimensions.
How-tos on reading a ruler, converting units, and measuring accurately.
Most online rulers make you fight through calibration menus and jargon before you see anything useful. MeasureKit shows a ruler the moment you open it, and only asks you to fine-tune it if you actually want more precision.