Disclaimer

Last updated: 2026-07-31

Informational tool only

ProtractorTool provides a free online protractor / protractor tool for estimating angles (and optional scaled lengths) in a web browser. Results depend on how you place the arms, image resolution, lens distortion, perspective, and display scaling.

No professional advice

Nothing on this site is professional engineering, surveying, medical, architectural, or legal advice. Do not rely on browser measurements alone for safety-critical, regulated, clinical, or contractual decisions.

Accuracy

We work to make the screen protractor clear and responsive, but we do not warrant absolute accuracy. For critical work, use calibrated instruments and qualified professionals.

Third-party content

If you measure angles on photos or screenshots you provide, you are responsible for having the rights to use those materials and for how you interpret results.

Liability

To the fullest extent permitted by law, operators of protractortool.com are not liable for losses arising from use of or inability to use the tool, including decisions made from displayed degrees or lengths.

Links to privacy, terms, or other resources are for convenience. We are not responsible for third-party sites.

See also Terms of Use and Privacy Policy.