Design tool
Online Protractor — Measure an Angle
Drag either ray handle or use the angle controls to match the two lines you want to measure.
Runs in your browser. No upload.
Set two rays to match the lines you want to measure. The angle is calculated locally.
Drag a ray handle or use its range control.
About this tool
Online Protractor — Measure an Angle made simple.
This browser tool measures the angle you set on the diagram. It does not inspect a camera image or guarantee a physical measurement.
Common questions
About Online Protractor — Measure an Angle.
How do I use Protractor?
Drag either ray handle or use the angle controls to match the two lines you want to measure.
Is my data uploaded to a server?
No. This tool runs locally in your browser. Your input is not uploaded.