Angle Converter
Convert between degrees, radians, gradians, arcminutes, arcseconds, and turns.
Frequently asked questions
How do I convert degrees to radians?
Multiply degrees by π/180 (approximately 0.017453). To go the other way, multiply radians by 180/π (approximately 57.2958). Common values: 180° = π rad, 90° = π/2 rad, 360° = 2π rad.
What is a gradian?
A gradian (also called grad or gon) divides a right angle into 100 units, so a full circle is 400 gradians. It was introduced in France during the metric reform to make angle arithmetic decimal. It is still used in some surveying and civil engineering contexts, particularly in Europe.
What are arcminutes and arcseconds?
One degree is divided into 60 arcminutes (′) and each arcminute into 60 arcseconds (″). They are used in astronomy (angular size of celestial objects) and navigation (latitude/longitude precision). 1 arcsecond of latitude ≈ 30.87 metres on Earth's surface.
