On Full Tilt? No, not a direct way. You can do it either by Hold'em Manager, or by calculating either FT points or PS points.
For example, I have accumulated 216.58$ rake on 28th of february and gathered 2,879.30 FT points and 439 PS points.
216.58$ rake = 2879.3 FT = 439 PS
1 $ rake = 13.3 FT = 2.02 PS
FT point = Full Tilt point
PS point = Poker Strategy point
So, for example, if you get 500 FT points in one day, that would be:
500 FT / 13.3 FT = 37.6$ Rake
And to convert this rake into actual rakeback (the amount you will get back every friday) you just multiply it by 0.27 (which equals 27%):
37.6$ x 0.27 = 10.1$
That is, if my HM shows rake properly. Hope it helps in any way!