Free online calorie counters can be found on WebMD and the U.S. Department of Agriculture's website. The calorie counter at WebMD is called the Food-O-Meter Calorie Counter and Calculator, while the USDA's tool is called SuperTracker.
The WebMD Food-O-Meter allows users to enter information to check calories and nutritional content for over 37,000 foods. The USDA SuperTracker also allows users to check calories and nutritional content for thousands of foods; however, it lets them plan meals and run reports based on the saved data. The data can be exported to Microsoft Word, Excel or a PDF file. Users can also log their physical activity on the site.