The conversion between Degrees and Radians is calculated by the relationship
where π is the mathematicial constant, PI = 3.14159265358979...
For further information on the units of measurement for angles, see the Wikipedia 'Angle' page.The Excel Radians function converts radians into degrees.
The syntax of the function is:
where the angle argument is the angle, in degrees, that is to be converted into radians.
The spreadsheets below show four examples of the Excel Radians function.
Formulas:

Results:

Note that in the above example spreadsheet, 180 degrees converts to π radians and 360 degrees converts to 2π radians.
Further details of the Excel Radians function are provided on the Microsoft Office website.