According to Mayoclinic.com, one hour of brisk walking at about 3.5 miles her per burns around 314 calories. Grocery shopping is a little bit less efficient than walking, but you can still get a significant workout from it. Oprah.com says you can burn about 210 calories in an hour of grocery shopping, plus 15 minutes of stocking new groceries at home. And if you have to carry them up any stairs, you can add 85 calories to the tally, coming in at 295 total calories. That's pretty comparable to the calories you burn during a walk.