(photo credit: Toronja Azul)

We all know eating out is more expensive (and more fattening) than eating in. But how much more expensive, exactly? Intern Anna did a little experiment:

Your stomach is grumbling and you’re trying to decide – do I head out the door or hit the kitchen?

Say you’re craving a good old turkey sandwich. That’s it. And you decide to stay in rather than roam the streets. So you grab…

- 2 slices of bread ( = grainy-goodness), $0.50

- 3 slices of turkey, $0.60

- 1 slice of cheese (the nice stuff), $0.35

- a bit of lettuce, $0.10

- 2 slices of tomato, $0.20

- a squeeze of mustard, $0.05

You’re all set and the total is… $1.80! Head to the local deli or grab a pre-packaged sandwich and you’ll probably be paying $5.00 – or more.

One New York City native really took the plunge and decided to only eat in – ever – and she wrote a book about her experience. She’s still blogging about not eating out in NY.

If you keep sweaters in your stove and have a taste for the gourmet, eating out might be a priority for you. But if you’re not opposed to spending more time waltzing down the grocery store aisles and dancing in the kitchen, eating in could keep your piggy bank nice and heavy.