Measurement Tools,
Done Right.
The measurement toolkit other sites wish they built. Fast, precise, and ready in one tap — no signup, no installs getting in your way..
Free forever
No signup, no paywalls, no premium tier. Every tool stays free, always.
Calibrated for accuracy
Tools calibrate to your exact screen for real, true-to-scale results — not a generic guess.
Nothing to install
Runs instantly in your browser on desktop, tablet, or phone. No app, no download.
Tools
4 availableOnline Ruler
A free digital ruler to measure real objects on-screen in mm, cm, inches and pixels.
Online Protractor
A free digital protractor to measure angles from images, camera, or on-screen points.
Aspect Ratio Calculator
Calculate matching width and height for any aspect ratio, then preview how your image or video fits.
Aspect Ratio Finder
Enter your width and height, or upload an image or video, to instantly find the simplified aspect ratio.
From the blog
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Built for accuracy. Designed to be loved.
Most on-screen tools give you a rough approximation and call it good enough. We don't. Every tool here is engineered for real, dependable precision, wrapped in an interface that's actually pleasant to use — no clutter, no bloat, no nonsense.
What's next
New tools ship regularly, each held to the same bar: fast, precise, beautifully simple, and free forever. This is the last measurement toolkit you'll need to bookmark.