8 free tools

Free Angle Tools

Everything runs in your browser: no sign-up, no uploads, and it works offline after your first visit.

Online Protractor
Measure any angle on your screen. 180° and 360°, real-size calibration, works offline.
Angle Finder
Use your phone's tilt sensor as a digital inclinometer, with roof pitch and percent slope.
Measure Angle from Photo
Tap three points on any picture. Private, with zoom, magnifier and PNG export.
Protractor Camera
A protractor overlay on your live camera. Freeze the frame and save a snapshot.
Printable Protractor
180° and 360°, 4-inch and 6-inch, PDF and PNG at actual size.
Angle Converter
Degrees, radians, gradians, turns, DMS, arcminutes and milliradians.
Miter Angle Calculator
Miter saw settings for frames with any number of sides or any corner angle.
Roof Pitch to Degrees
Convert x/12 pitch, degrees and percent slope, with rafter length.