Convert angles between degrees, radians, gradians, turns and arc units — for math, engineering and navigation.
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How to use the Angle
Enter the number you want to convert in the Value field.
Pick the unit you're converting From and the unit you want To.
Read the converted result, or use ⇅ to swap the two units.
Check the All units table to see your value expressed in every supported unit at once.
Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.
About Angle
Common angle units
Degrees (everyday and navigation), radians (math and physics), gradians (surveying) and turns (full rotations).
Key conversions
180 degrees = pi radians. 1 turn = 360 degrees = 2 pi radians = 400 gradians.
Where it helps
Trigonometry, programming (most languages use radians), CAD and surveying.
Frequently asked questions
How do I convert degrees to radians?
Multiply by pi/180 (about 0.01745).
What is a gradian?
A unit where a right angle is 100 gradians; a full circle is 400.
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