Can I measure angles on images?

Overlaying the protractor on images is not yet supported in the current version, but is planned for future updates.

Can I use it on a smartphone?

Yes, it supports touch operation, so it works comfortably on smartphones and tablets.

Can it measure a full 360 degrees?

Yes, it can measure angles from 0 to 360 degrees in all directions, including acute, obtuse, and reflex angles.

All processing happens in your browser. No data is sent to any server.

Online Protractor

Measure angles precisely with an online protractor in your browser. Drag to intuitively align and measure angles.

Angle

0.0Degrees

SnapFull Circle View

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📖

How to Use

Step 1

Set Baseline

Set the center point and baseline of the protractor

→

Step 2

Adjust Angle

Drag the measurement line to adjust the angle

→

Step 3

Read Angle

Check the displayed angle value in the digital readout

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Features

Digital Angle Display

Shows accurate digital values in addition to scale markings

Drag Operation

Intuitively adjust angles with mouse or touch controls

Degrees & Radians

View angles in both degrees and radians

❓

FAQ

Angles are displayed to 0.1 degree. Accuracy depends on screen operation precision, but it is sufficient for education and everyday use.

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