Terms of use
Terms
By using ProtractorLab, you agree to use it responsibly and to independently verify important measurements.
Tool availability
The site is provided as a general-purpose educational and productivity tool without a guarantee that it will always be available, error-free or compatible with every device.
Measurement limitations
Results depend on point placement, source-image resolution, perspective, camera distortion and device sensor quality. The tool is not certified measuring equipment.
Safety-critical work
Do not rely solely on this tool for medical diagnosis, structural engineering, construction safety, manufacturing tolerances or any decision where an inaccurate measurement could cause harm. Use certified equipment and qualified professional review.
Your content
You are responsible for having permission to use any image you open. Image processing occurs locally; the site does not acquire ownership of your content.
Exports and local data
You are responsible for checking exported files and maintaining any needed backups. Browser storage may be removed by you, browser settings or storage policies.