Question: how much caffeine does caffeine free diet coke have?
Answer: Decaffeinated varieties, such as caffeine-free Coca-Cola, are also available for those looking to cut their caffeine intake. Coke contains 32 mg of caffeine per 12-ounce (335-ml) serving. Diet Coke is higher in caffeine, with about 42 mg per 12 ounces (335 ml).