# ››Convert radian to full circle

We assume you are converting between radian and full circle.
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The SI derived unit for angle is the radian.
1 radian is equal to 0.159154943092 full circle.
Note that rounding errors may occur, so always check the results.
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In mathematics and physics, the radian is a unit of angle measure. It is the SI derived unit of angle. It is defined as the angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle. Angle measures in radians are often given without any explicit unit. When a unit is given, sometimes the abbreviation rad is used, sometimes the symbol c (for "circular").

# ››Definition: Full circle

The full circle or full turn or cycle or rotation or revolution uses k = 1/2pi, making the angle of 1 full circle = 2pi rad = 4 right angles = 400 gon = 360°.

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