Angle converter
Convert angles between degrees, radians, gradians, turns and degrees, minutes and seconds (DMS), with the sine, cosine and tangent of the angle and the equivalent angle between 0° and 360°.
Degrees to radians and DMS
Everything happens on your device: nothing is uploaded to the internet.
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Angle converter: what it is for
Type an angle in degrees, radians (π accepted), gradians, turns or DMS format and see every conversion at once. The tool also shows the sine, cosine, tangent and the equivalent angle between 0° and 360°.
How to use
- Type the angle.
- Choose the source unit.
- See the conversions and trig functions.
When to use it
- Converting coordinates to DMS.
- Studying trigonometry.
- Programming with functions that use radians.
Frequently asked questions
How do I convert degrees to radians?
Multiply by π and divide by 180. So 90° = π/2 ≈ 1.5708 rad and 180° = π rad.
What is DMS?
It is the degrees, minutes and seconds notation, used in surveying, navigation and coordinates. One degree has 60 minutes and one minute has 60 seconds: 12.5° = 12° 30′ 0″.
What is a gradian?
A unit in which a full turn has 400 gradians, used in some surveying instruments. 90° = 100 gradians.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.