Radian
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SI unit of angular measure
About Radian (rad)
The SI unit of angular measure, one radian is the angle subtended at the center of a circle by an arc equal in length to the radius. A full circle is 2*pi radians (approximately 6.283 rad). Radians are essential in calculus and physics because trigonometric functions have their simplest derivatives when angles are in radians.
- Category
- Angle
- Symbol
- rad
- Also known as
- radians
CONVERT TO
Frequently Asked Questions
What is a Radian (rad)?
SI unit of angular measure
How many Degree (°) are in one Radian (rad)?
One Radian (rad) equals 57.2958 Degree (°).
How many Gradian (gon) are in one Radian (rad)?
One Radian (rad) equals 63.662 Gradian (gon).
How many Arcminute (′) are in one Radian (rad)?
One Radian (rad) equals 3,437.75 Arcminute (′).
How do I convert Radian to Degree?
To convert Radian to Degree, multiply the value by 57.2958 (1 rad = 57.2958 °).