Last updated: October 29, 2026.
By using Online Ruler you agree to these terms.
Use of the tools
The tools are free for personal and commercial use. Do not try to disrupt the site, copy it in bulk or use it for anything unlawful.
Accuracy
On-screen measurements depend on your screen, browser zoom, system scaling and calibration. Results are provided as they are, without any warranty. Do not rely on them where an exact measurement matters, such as medical, legal, engineering or safety uses. Use a physical measuring tool in those cases.
Liability
To the extent the law allows, we are not liable for any loss caused by using the site or its results.
Changes
We may update the tools and these terms at any time. The date at the top shows the latest version.
Contact
Questions? Use our contact page.