Explanation
One radian is equal to the amount of rotation required to travel one radius along the circumference of the circle, as seen in the image above. A full-rotation or 360° in radians is equal to the value of 2π. A half-rotation or 180° in radians is equal to the value of geometric constant π (pi).
Notes
To convert radians to degrees, see the DEGREES function. A full-rotation (360°) in radians is equal to 6.283 or 2π A half-rotation (180°) in radians is equal to 3.142 or π (pi).
Dave Bruns
Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.
![Excel RADIANS function - 27](/sites/default/files/images/functions/inline/radians.png)