How Much Caffeine in Coffee? Flat White, Long Black & More

A flat white, a long black, a slow filter: the drink name tells you something about how your coffee is made, but it does not give you an exact caffeine measurement.

The beans, dose, recipe and serving size all matter. Published figures are useful reference points, not a laboratory result for the cup in your hand.

How much caffeine is in a coffee?

The Australian Institute of Sport’s reference table illustrates the spread. It lists brewed coffee at an average of 80 mg per 250 ml, with a 40–110 mg range, and short black or espresso servings from different outlets at an average of 107 mg, with a 25–214 mg range. A separate entry for brewed coffee from the same outlet on different days spans 130–282 mg per 250 ml. These are examples from published data, not universal limits or measurements of Janeiro coffee. Source: Australian Institute of Sport.

Flat white or long black?

Start with the espresso recipe. If both drinks contain the same espresso, adding plain milk to one and water to the other changes the concentration and texture, rather than the amount of caffeine contributed by that espresso.

Shot recipes vary between cafés. Ask how the drink is made rather than assuming that every flat white or long black contains the same number of shots. For the differences in the cup, explore our flat white and latte guide.

Filter and cold brew

A larger serving can contain more caffeine even when it tastes less concentrated. With cold brew, distinguish concentrate from the drink you actually pour: dilution and serving size change how much concentrate ends up in the glass. Follow the product’s preparation instructions where available.

Does decaf contain caffeine?

Decaf is lower in caffeine, but it is not necessarily caffeine-free. The US Food and Drug Administration gives a typical range of 2–15 mg for an approximately 237 ml cup of decaf. That is general guidance, not a measured caffeine value for our Colombian decaf. Source: FDA.

Our Colombia Decaf uses sugarcane-derived ethyl acetate in its decaffeination process. Its medium roast brings caramel, brown sugar and toffee notes, with a red-apple finish.

A useful way to compare

Look at the serving size and recipe, use any caffeine information supplied for the specific drink, and keep the uncertainty in mind. We have not laboratory-tested the caffeine content of these Janeiro coffees, so we do not promise a fixed number per cup.

If you need to manage caffeine for a health reason, ask your doctor or pharmacist for guidance suited to you.