Angle Converter - Convert Degrees, Radians, Gradians and More
Convert between angle units: Degrees, Radians, Gradians, Arcminutes, Arcseconds, and Turns
Converters
Angle Converter
All conversions
Degree (°)
90
Radian (rad)
1.570797
Gradian (grad)
99.9999
Arcminute (')
5,400
Arcsecond ('')
324,000
Turn (revolution)
0.2500002
How to Use
1Enter the angle value you want to convert
2Select the source unit (from)
3View conversions to all other angle units instantly
4Use the table to find your target angle unit
Frequently Asked Questions
To convert degrees to radians, multiply by π/180 (approximately 0.01745). For example, 90° = 90 × π/180 = π/2 ≈ 1.5708 radians. A full circle is 360° = 2π radians.
A gradian (also called gon or grade) divides a right angle into 100 parts, making a full circle 400 gradians. They are used in surveying and some European countries. 1 gradian = 0.9 degrees.
Arcminutes (') and arcseconds ('') are subdivisions of a degree. 1 degree = 60 arcminutes, 1 arcminute = 60 arcseconds. They are used in astronomy, geography (latitude/longitude), and optics.
One turn (or revolution) represents a complete 360° rotation. 1 turn = 360 degrees = 2π radians = 400 gradians. Turns are sometimes used in engineering to describe rotational speed or position.