The pH level of Coca-Cola Classic is 2.53. Coca-Cola Classic contains 9.3 teaspoons of sugar in a 12-ounce serving size. The same serving size delivers 140 calories and 34 milligrams of caffeine to the consumer.
The pH levels or acidic levels of some foods and beverages have been determined to cause tooth erosion. Acid erosion is a serious condition that destroys tooth enamel. Soft drinks such as Coca-Cola Classic, sour candy, chewable vitamins and problems with the reflux of stomach acid, are known causes of tooth erosion. Other culprits, aside from Coca-Cola Classic, include some fruit drinks, diet soda and some teas.