Through the years, burgers have changed. Back in the 1980s, the average restaurant burger had 333 calories. Today's, they're coming in at almost twice that -- 600 calories on average.

Here's a rundown of some burgers to avoid if you're trying to slim down for swimsuit season:

• Worst Fast-Food Burger -- Burger King Whopper with Cheese (760 calories)
• Worst Burger Kids' Meal -- McDonald's McDouble Mighty Kids Meal (765 calories)
• Worst Double Cheeseburger -- Denny's Double Cheeseburger (1,400 calories)
• Worst "Healthy" Burger -- Ruby Tuesday Avocado Turkey Burger (968 calories)
• Worst Burger in America -- Chili's Jalapeno Smokehouse Bacon Burger (1,910 calories)

Source: Yahoo Health