There's some links to online servo torque calculators in the sticky FAQ thread in the Aerodynamics forum as well.

http://www.rcuniverse.com/forum/m_2867994/tm.htm

I suggest that if you use these take the reading and bump it up by 1.5 to 2 times and use that torque value to shop for servos. You don't want to find yourself pushing the limits as small servos near their torque limit draw more current trying to work than slightly larger ones operating well within their limits.