grade = 0.015707963267949 radian
Try converting from "grade" to arc minute (minute of arc), arc s (second of arc), centesimal minute, centesimal second, circle, degree (Pi rad / 180), octant, quadrant, rad (radian), revolution, sextant, sign, turn, or any combination of units which equate to "plane angle" and represent plane angle.
grade = 54 arc minute (minute of arc), 3,240 arc s (second of arc), 100 centesimal minute, 10,000 centesimal second, .0025 circle, .9 degree (Pi rad / 180), .02 octant, .01 quadrant, .01570796 rad (radian), .0025 revolution, .015 sextant, .03 sign, .0025 turn.
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