I don't think so DBate, not unless your Ground Speed is 60 Knots.
wilcoluca, I think you'll get much better results if you use -
ROD (fpm) = % Gradient X Ground Speed (Knots)
e.g. for a 120 Kt Groundspeed and a 6% gradient, ROD = 6 X 120 = 720 fpm. (For the purists it's actually 729 fpm, but who can read 9 fpm).
Regards,
Old Smokey