ReferenceExcel FormulasSupported FormulasRADIANSOn this pageRADIANS The RADIANS function converts degrees to radians. Syntax =RADIANS(angle) Parameters angle: The angle in degrees that you want to convert to radians Examples =RADIANS(180) // Returns 3.14159... (π)=RADIANS(90) // Returns 1.57080... (π/2)=RADIANS(45) // Returns 0.78540... (π/4)