What is the proper way to weigh meat or fish...is it the weight before cooking or after...raw or cooked?  I've noticed that two ounces of uncooked meat weighs less after I cook it.  

Most diets or sources will say "precooked weight". So ideally, it means the raw weight before cooking. The loss of weight is mostly due to water, and in that vein, you could theoretically eat a MASSIVE amount of something like beef jerky compared to a much smaller amount of rare filet mignon or something.     Not that anyone would probably overdose on beed jerky but if you're trying to stick to a diet or nutrition plan, it's the pre-cooked weight that matters.

Quoted from Stormstryk

Most diets or sources will say "precooked weight". So ideally, it means the raw weight before cooking. The loss of weight is mostly due to water, and in that vein, you could theoretically eat a MASSIVE amount of something like beef jerky compared to a much smaller amount of rare filet mignon or something.     Not that anyone would probably overdose on beed jerky but if you're trying to stick to a diet or nutrition plan, it's the pre-cooked weight that matters.

That's what you think.

Debra

I've always weighed my meat, fish, poultry after cooking.

Oh Debra...you're so funny.  Well, I guess either way is ok then but I'll probably stick with the "precooked"" way of determining the weight of my food because I'm always interested in eating less as opposed to more...a slightly anorexic way of thinking I know; but it works for me. Having been a very overweight child I'm always looking for ways not to be an overweight adult.  So far I've been able to accomplish that.  

I believe that usually porton sizes for protein sources such as fish, meat, fowl are determined as the cooked weight.  For instance, 4 ounces raw (uncooked) meat, fish, fowl usually factors being around roughly 3 ounces cooked weight.  

Other protein sources such as beans, tofu, tempeh, nuts/seeds are dry weight on a food scale or in a measuring cup.

Alia

I believe the quantity given of beans is for cooked beans, cause dry uncooked would render a lot of beans with a cup of dry ones!

the dry grains is more for cereal, nuts etc.......that s what I think.