In Excel, The RADIANS is a Math & Trigonometry function that converts degrees into radians. In this guide, we’re going to show you how to use the RADIANS function and go over some tips and error handling methods.

Supported versions

  • All versions




angle A degree value that you want to convert.


A radian is a unit of measurement of angles. One radian is defined as the angle subtended from the center of a circle which intercepts an arc equal in length to the radius of the circle.

The math behind the calculation is simple:

Which can be simplified into:

You can use PI function to return π value.

All you need to do is to supply the angle degreed you want to convert.


Excel RADIANS Function 04

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  • To convert radians to degrees, use the DEGREES Function.