The calorie content in a Whataburger varies depending on the type of burger. Here are some examples:

• A standard Whataburger with one large beef patty, tomato, lettuce, pickles, diced onions, and mustard on a toasted 5-inch bun contains about 590 calories.
• A Whataburger Double Meat Whataburger on a 5-inch bun has about 835 calories.
• A plain Whataburger burger has around 557 calories.

The standard Whataburger (590 calories) seems to be the classic option most commonly referenced for calorie content. Let me know if you want calorie information for a specific Whataburger menu item or more detailed nutritional breakdowns.