Angle Converter
Convert angle units
Common Conversions:
• 180° = π rad
• 90° = π/2 rad
• 1° = 60' (arcminutes)
• 1' = 60" (arcseconds)
Frequently Asked Questions
How do I convert degrees to radians?
Formula: radians = degrees × π / 180. Example: 90° = 90 × π / 180 = π/2 ≈ 1.5708 radians. Or use the conversion factor: 1 degree = 0.0174533 radians.
What is a gradian and when is it used?
A gradian (grad) is 1/400 of a full circle. 1 grad = 0.9 degrees. Gradians are used in some European surveying and civil engineering applications. 100 gradians = 90 degrees = right angle.
What are arcminutes and arcseconds?
Arcminutes and arcseconds are subdivisions of degrees used in astronomy, navigation, and surveying. 1 degree = 60 arcminutes ('). 1 arcminute = 60 arcseconds ("). Example: 1° 30' 45" = 1.5125 degrees.