radian = 1 radian
Try converting from "r" to arc minute (minute of arc), arc s (second of arc), centesimal minute, centesimal second, circle, degree (Pi rad / 180), grade, octant, quadrant, rad (radian), revolution, sextant, sign, turn, or any combination of units which equate to "plane angle" and represent plane angle.
r = 3,437.75 arc minute (minute of arc), 206,264.81 arc s (second of arc), 6,366.2 centesimal minute, 636,619.77 centesimal second, .15915494 circle, 57.3 degree (Pi rad / 180), 63.66 grade, 1.27 octant, .63661977 quadrant, 1 rad (radian), .15915494 revolution, .95492966 sextant, 1.91 sign, .15915494 turn.
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