How can I determine fat content in beef? I'm looking to determine with as much accuracy as possible (without buying specialized equipment) the fat percentage of ground beef.  Is anyone aware of a method that will get me reasonably close?

I found some ideas over here but I'm not confident that any of them are terribly accurate (save the one with the calorimeter.) 
http://ask.metafilter.com/152910/A-way-to-test-the-fat-content-of-minceground-beef-at-home
Weigh the ground meat before starting to determine its total weight.
Render as much fat as possible in the ground meat by boiling or simmering.
Use a fat separator to separate off the fat
Allow the fat to dry (or dry it by gently bringing to >100°C/212°F, beware splattering).
Weigh the amount of fat rendered.


Fat percentage is 100 × (fat weight) ÷ (total weight).

Alternative method: Ask farmer which primal cut the meat is ground from. Look up answer in table. :-P