1. Agreement to Terms

By accessing and using Online Free Protractor or any of its sub-tools (including the Screen Ruler, Image Protractor, Camera AR Protractor, Compass Inclinometer, and Practice Quiz), you agree to be bound by these Terms and Conditions. If you do not agree with any part of these terms, please discontinue use of the site.

2. Free Educational & Professional License

We grant you a free, non-exclusive, worldwide, royalty-free license to use our measurement tools for personal DIY projects, academic instruction, commercial drafting, and sharing unwatermarked diagrams.

3. Measurement Accuracy & Calibration Disclaimer

While our tools calculate mathematical angles with floating-point trigonometric precision down to 0.1° and 0.001 rad, physical 1:1 screen ruler accuracy depends on proper hardware PPI calibration by the user.

Terms & Conditions

1. Agreement to Terms

2. Free Educational & Professional License

3. Measurement Accuracy & Calibration Disclaimer