How do you approximate the caloric contents of a mixed food?

[kjwise]

For instance when eating soup, hamburger, pizza, or other foods that you can't dissamble or weight, how do you figure out the approximate value?

A slice of pizza is relative to what you put on it for instance, and to how much it weights.

Any good tricks welcome.

 

[8-]]

You should be able to approx values from the manufacturers of the pizza, soup etc, if its bought from a store.

If it is from a fast food vendor you should be able to find details on the web.

I just did a search on Google for "pizza hut nutrition" and found lots of URLs including the one below:

http://www.pizzahut.com/menu/nutrition/pizza_handtoss.htm

I did another search using keywords "mcdonalds nutrition" and got plenty of URLs including the one below:

http://www.mcdonalds.com/countries/usa/food/nutrition_facts/

Hope this helps.

 

[fiatconspiracy]

guess the mass and density of the food a low estimate would be the mass times 4c/g a high would be *9c/g. always estimate high, look on the internet , there are comparason charts like, hamburger the volume of a tennis ball may range from x to y calories......
but unfortuantly everything has more calories than you estimate.......