You’re hungry, and you’re in a hurry – so you grab a burger, a taco, or a burrito. But before you take a bite, think about it: You’ll need to exercise a lot to burn off those calories. Even the options that seem light – the smaller burger, the breakfast sandwich, the wrap – are more fattening than you might think.

So how much havoc can a fast food meal wreak on your otherwise healthy diet? We’ve crunched the numbers, compiled the calorie counts, and even created a simple interactive calculator so you find out exactly how much exercise it would take for you to work off each meal. Here’s to making healthy choices!