How much caffeine is in Diet Coke, Coca‑Cola and Coke Zero?
There is 96mg of caffeine in one litre of Coke Zero or Coca-Cola and 128mg in a litre of Diet Coke. This equates to about 32mg in a 330ml can of Coca-Cola and 42mg in a 330ml can of Diet Coke. To help put this in context, a mug of tea contains about 75mg of caffeine and a mug of coffee provides about 100mg of caffeine.
So the levels of caffeine in Coca-Cola are actually relatively low in comparison to other drinks. But if you want to avoid caffeine or reduce your intake, try Caffeine-Free Diet Coke or one of our other caffeine-free sparkling brands, such as Fanta or Sprite.