Soft drinks

How much caffeine is in Diet Coke?

Caffeine content for a standard US can. Check the package for the most relevant local value.

How long might it remain?

Using the calculator’s five-hour half-life model, this serving would take approximately 4.4 hours to fall below 25 mg. This is a mathematical estimate, not a measurement of your body.

Source: Coca-Cola product information

Product formulations can change. Check the current package or menu for the serving you consumed.