Most fast food restaurants have nutrition information on their web sites. So far, I've checked Chik-Fil-A, Burger King, McDonalds, and Wendy's and they're all good.

Here's the "component" nutrition information from BK.
http://www.burgerking.com/Food/nutr...ds/foodcomp.pdf

For FitDay, I would create a custom food and type in "Burger King Double Hamburger, No Bun" or something like that and then enter the dietary info on the link I provided.

Don't forget to count condiments which are also on the link above.

Sam
PS BK double hamburger patties are 0 carbs.