I am having problems with working out macronutrients for the food I eat.

As I cook from whole foods and never eat anything out of tins it is very difficult to work these out. I've tried several websites. One doesn't like my apple computer and won't keep any info for me and won't let me put in a seond food. Another spat the dummy and told me I had done something illegal and then gave me a nothing page.

Are there any rules of thumb I can use?

Or is there a foolproof site? Ie one that will tolerate someone who doesn't eat Campbells foods or anything processed?