The following functions provide useful conversions:

converts an angle measured in radians to degrees.

converts an angle measured in degrees to radians.

converts the polar coordinate (r, theta) into the rectangular coordinate (x, y). Theta should be expressed in units corresponding to the current angular mode.

converts the rectangular coordinate (x, y) into the polar coordinate (r, theta). Theta is returned in units corresponding to the current angular mode.

converts a number from a decimal-fraction (H.h) to minutes-second (H.MMSSs) format. This is useful for time expressed in hours and angles expressed in degrees.

converts a number in minutes-second format to decimal-fraction format. All of the calculator's functions (except this one) require numbers to be in decimal-fraction format.

For example,

Press to convert pi to 180 degrees.

Press to convert 360 degrees to 2 pi radians.

Press (in RPN mode, use ) to convert the rectangular coordinate (x = 1, y = 2) to the polar coordinate (magnitude = 2.2361, angle = 63.4349 degrees). (Press button to view theta.)

Press to convert 2.5 hours to 2 hours 30 minutes (2.30000 or 2"30'00.0).

Press to convert 4 hours 23 minutes 48 seconds to 4.3967 hours.