Geometry & Trig•Live Bidirectional•100% Client-Side
Angle Converter
Convert geometric and trigonometric angles: Degrees (°), Radians (rad), Gradians, and Arcminutes.
°
rad
1.570796
Unit Equivalence:1 Degree = 0.017453 Radian(1 rad = 57.29578 °)
90 Degree (°) in All Angle & Geometric Units
Degree°
90Radianrad
1.570796Gradiangrad
100Milliradianmrad
1570.796327Arcminutearcmin
5400Arcsecondarcsec
324000Conversion Formula & Standards
Conversions follow International System of Units (SI) and ISO standard constants.
Radians = Degrees × (π / 180) | Degrees = Radians × (180 / π)
How to Use Angle Converter
01
Enter an angle value.
02
Choose from Degrees, Radians, Gradians, or Arcminutes.
03
View exact circle fraction and trigonometric radian equivalents.
Frequently Asked Questions
How many radians are in a full circle?
A full 360° circle contains exactly 2π radians (approximately 6.28318 rad). A 180° straight angle equals π radians.
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