Most restaurants like Chilis, Olive Garden, Dennys, and IHOP display nutritional information directly on their website or listed with each individual food item. It can usually be found listed within the menu section or in its own section under nutritional info or fact sheet.
In 2011, the FDA proposed regulations that fast food establishments with more than 20 branches are required to post this information so that it is readily available for customers. Providing calorie counts and other nutrition information in restaurants and similar retail food establishments would assist consumers in making healthier dietary choices.
The best way to find the information if it is not apparent on the website is to call the restaurant and speak to a manager.