How many radian in 1 full circle?
The answer is 6.28318530718.

We assume you are converting between **radian** and **full circle**.

You can view more details on each measurement unit:

radian or
full circle

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.

Use this page to learn how to convert between radians and full circle.

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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").

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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