Calories are listed next to menu items in a McDonald's restaurant July 18, 2008 in New York City.
Calories are listed next to menu items in a McDonald's restaurant July 18, 2008 in New York City. - 
Listen To The Story
Marketplace

And finally, just how many calories ARE in a Big Mac?

Well, starting Monday, it'll be easy to find out. McDonald's says it'll start posting calorie information in all its U.S. outlets next week. The chain is already doing it in cities like New York, where it's required.

I got curious about my personal indulgence -- the double quarter pounder with cheese -- and I found the calorie count on McDonalds' website: 750 calories.

Maybe I'll start downsizing to the double cheeseburger at 440 calories.

Follow Sarah Gardner at @RadioGardner