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Excel RADIANS Function

Excel RADIANS function
Summary 

The Excel RADIANS function converts degrees to radians. For example, =RADIANS(180) returns 3.1415 (the value of Pi).

Purpose 
Converts degrees into radians
Return value 
Radians
Syntax 
=RADIANS (angle)
Arguments 
  • angle - Angle in degrees to convert to radians.
Usage notes 

The RADIANS function takes an angle in degrees and converts it to radians. Radians measure angles using the radius of a circle. A radian is equal to the amount of rotation required to travel one radius along the circumference of the circle, as seen in the image below:

Radians are a unit of measure for circles

To convert radians to degrees, see the DEGREES function.

Related functions 
Excel DEGREES function
Excel DEGREES Function
The Excel DEGREES function converts angles (expressed in radians) to degrees. For example, the formula =DEGREES(PI()) returns 180.
Excel PI function
Excel PI Function

The Excel PI function returns the value of pi. For example, the formula =2*PI() * 3 returns the circumference of a circle with a radius of 3.

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