Terms of Service
Last Updated: September 2026 • Effective Date: September 2026
1. Agreement to Terms
By accessing and using Online Protractor ("the Service", "the website", or "the tool"), you agree to be bound by these Terms of Service ("Terms"). If you do not agree with any part of these Terms, you may discontinue use of the website immediately.
2. License and Permitted Use
We grant you a non-exclusive, revocable, worldwide, royalty-free license to use the Online Protractor tool directly in your web browser for:
- Personal and Educational Use: Completing school geometry homework, classroom demonstrations, academic research, and self-study.
- Commercial and Professional Use: Inspecting technical diagrams, architectural drawings, carpentry joints, CAD models, and design layouts.
The tool is free of charge and requires no paid subscription or account creation.
3. Measurement Accuracy & Calibration Disclaimer
Important Notice on Precision: The Online Protractor computes geometric angle values mathematically using sub-pixel coordinates. However, physical real-world measurement depends on user input accuracy, screen pixel density (PPI/DPI), physical card calibration, and potential perspective or parallax distortion when using digital camera lenses.
The tool is designed for educational, reference, and non-safety-critical estimation purposes. It should not be relied upon as the sole instrument for structural engineering, medical devices, aviation navigation, or critical life-safety applications where certified calibrated physical instruments are legally required.
4. Intellectual Property Rights
All proprietary software code, canvas rendering algorithms, graphics, user interface designs, and educational content provided on this website are the intellectual property of Online Protractor and protected by copyright and intellectual property laws. You retain full ownership of any image files, screenshots, or drawings you choose to inspect using the tool.
5. Prohibited Uses
When accessing our website, you agree not to:
- Interfere with, disrupt, or burden the website infrastructure or security mechanisms.
- Deploy automated scrapers, bots, or spiders in a manner that degrades service availability for other users.
- Frame, mirror, or repackage the service as a paid application without explicit prior written consent.
6. Disclaimer of Warranties
The service is provided on an "AS IS" and "AS AVAILABLE" basis without warranties of any kind, whether express or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, or non-infringement.
7. Limitation of Liability
To the maximum extent permitted by applicable law, Online Protractor and its operators shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of your access to or use of the tool.
8. Modifications to Terms
We reserve the right to modify these Terms at any time. Changes will be posted to this page with an updated effective date. Continued use of the website following changes constitutes acceptance of the revised Terms.
9. Contact Us
For legal or terms of service inquiries, please contact: