Box of Valentine's Day chocolates? 1 piece could pack 100 calories

Valentine's Day is a day full of sweet treats, but eating too many of them can rack up calories.

Consumer Reports checked out Valentine’s Day candies to see what a 100-calorie serving looks like.

"We looked at ten popular Valentine’s Day candies and calculated how much it would take to add up to 100 calories," said Consumer Reports Nutritionist Maxine Siegel. "It’s an easy way to keep track of how much you’re consuming.”

If you love those Sweethearts conversation candies, you’re in luck: You can say “be mine” to 30 of these before you hit the 100-calorie mark.

For 100 calories of Brach's Cinnamon Imperial Hearts, you have to eat 57. But if your sweet tooth leans toward sour, grab 18 SweetTarts Hearts.

If you're eating chocolates, though, you need to pace yourself, according to Consumer Reports.

One hundred calories add up fast: About three of dark chocolate hearts from Dove will hit the mark, or just two pieces of Godiva Valentine’s Day Message Truffles. Boxed chocolate, such as Whitman’s Assorted or Ferrero Rocher Hazelnut Chocolates, can get to 100 calories in just one piece.

The good news with any of it, though, is that Consumer Reports nutritionists give the green light to indule your sweet tooth once in awhile.

“It’s OK to have a treat now and then, it actually can help you stick to a healthy eating pattern because you don’t feel so deprived," Siegel said.

If you plan to ration your intake, make sure to store your chocolate in a cool, dry place, but not in the refrigerator where chocolate can pick up odors and flavors from other foods.

If your chocolates develop a chalky haze on the surface, it can mean they've been stored improperly. It's usually just the surface, not the flavor, that's been affected, so they're safe to eat.