How much caffeine is in a flat white — and every other coffee?
A flat white typically contains around 150mg of caffeine — the equivalent of a double espresso, since that’s its base. A single espresso contains approximately 63mg. A double espresso, latte, and cappuccino are all in the 126–150mg range. Decaf contains roughly 2–5mg. Matcha sits at approximately 40–70mg. Here’s the full breakdown, with daily limits and what they mean in practice.
The flat white: why it’s a useful starting point
The flat white is one of Britain’s most popular café orders — and it’s a useful caffeine benchmark because it’s made from a double ristretto (a shorter, more concentrated espresso pull), which produces roughly the same caffeine as a standard double espresso despite being a slightly smaller volume.
A flat white at approximately 150mg of caffeine is a meaningful dose. It will make most people more alert. For someone with no tolerance built up, it’s a noticeable amount. For a regular coffee drinker, it’s a solid morning hit that leaves room for a second cup later.
Caffeine by drink: the full table
| Drink | Espresso shots | Caffeine (approx.) |
|---|---|---|
| Single espresso (30ml) | 1 shot | ~63mg |
| Double espresso (60ml) | 2 shots | ~126mg |
| Flat white | Double ristretto | ~150mg |
| Latte | Double espresso | ~126–150mg |
| Cappuccino | Double espresso | ~126–150mg |
| Americano | Double espresso + water | ~126mg |
| Cortado | Double espresso | ~126mg |
| Decaf (per shot) | 1 decaf shot | ~2–5mg |
| Matcha (2g ceremonial) | — | ~40–70mg |
| Chai latte | — (black tea base) | ~40–70mg |
A few things to note about this table:
Decaf is not zero. A decaf espresso contains approximately 2–5mg per shot — very low, but not absent. If you’re under strict medical advice to avoid caffeine entirely, this is worth knowing. See our decaf guide for more.
Matcha has meaningful caffeine. A ceremonial-grade matcha contains approximately 40–70mg — roughly half a single espresso. It’s a real caffeine source, not a caffeine-free alternative.
Milk adds nothing. The steamed milk in a latte, cappuccino, or flat white contributes no caffeine whatsoever. The only variable is how many espresso shots the drink is made with.
Shot counts vary. Some cafés pull single shots for smaller drinks and doubles for larger ones; some always use doubles. If you’re at a new café and caffeine tracking matters to you, it’s worth asking.
How much caffeine is too much?
The NHS and the European Food Safety Authority (EFSA) both provide guidance on safe daily caffeine consumption:
- Healthy adults: up to 400mg per day is considered safe for most people
- Pregnant women: no more than 200mg per day (NHS guidance)
- Children and adolescents: lower thresholds apply; the general advice is to minimise caffeine
In practical terms:
– Two flat whites = approximately 300mg — within the adult limit
– Three flat whites = approximately 450mg — above the recommended limit
– One flat white during pregnancy = approximately 150mg — within the 200mg limit, but leaving little room for other caffeine sources (tea, chocolate, cola)
The 400mg limit is a guideline, not a cliff edge. Individual responses to caffeine vary considerably based on genetics, body weight, tolerance, and health conditions. Some people notice effects from a single espresso; others can drink several cups with no notable response. Listening to your body matters as much as the numbers.
What affects how you experience caffeine?
Several factors influence how a given dose of caffeine affects you:
Genetics. The CYP1A2 enzyme metabolises caffeine in the liver. People with a “fast metaboliser” variant clear caffeine quickly and tend to be less sensitive. “Slow metabolisers” clear it more slowly and may experience stronger or longer-lasting effects from the same dose.
Tolerance. Regular coffee drinkers develop some tolerance to caffeine’s effects over time, meaning the same dose produces a less dramatic response than it did initially.
Food. Caffeine is absorbed more slowly when consumed with food, which can reduce the sharpness of its effects.
Body weight and composition. Caffeine effects vary by body weight, though this is less significant than the genetic and tolerance factors.
Time of day. Caffeine consumed in the evening is more likely to disrupt sleep, since its half-life of 5–7 hours means a 6pm coffee is still partially active at midnight.
Where does the caffeine in coffee come from?
Caffeine is a naturally occurring compound in the coffee plant (Coffea arabica and others). It evolved as a natural pesticide — caffeine is toxic to insects at the concentrations found in coffee leaves and beans, protecting the plant from pests.
The caffeine content of a specific espresso depends on:
- The bean variety — robusta beans contain roughly twice the caffeine of arabica. Most speciality coffees use arabica.
- The roast — lighter roasts retain slightly more caffeine than dark roasts (the difference is small)
- The grind and extraction — a longer extraction or finer grind extracts more caffeine
- The dose of coffee used — a 20g dose of ground coffee extracts more caffeine than a 14g dose
The flat white vs other strong drinks
The flat white is sometimes assumed to be the strongest café drink because of its reputation. That’s approximately true by caffeine content — it’s at the higher end of the standard menu. But it’s worth noting that a large coffee shop latte made with three shots (a common upsize) would exceed it considerably.
Among standard double-shot drinks, the flat white sits alongside the latte and cappuccino in terms of caffeine. Its reputation for strength comes from its smaller size — the same caffeine in fewer sips feels stronger, even though the absolute dose is the same.
Framberry’s coffee and caffeine
All of Framberry’s espresso drinks are made with ethically sourced beans from our roaster. Our standard espresso drinks are made with a double shot; our flat white uses a double ristretto. Oat milk is our default, which contains no caffeine.
For a drink-by-drink look at all the options, see our coffee menu. For the energy comparison between coffee and matcha, see our coffee vs matcha energy guide.
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Frequently asked questions
Does a flat white have more caffeine than a latte?
In practice, they’re very similar — both around 126–150mg for a double-shot version. The flat white uses a ristretto, which is slightly more concentrated but similar in total caffeine. The main difference is size, not caffeine.
Is a double espresso or a flat white stronger?
The caffeine is similar — a double espresso is approximately 126mg, a flat white approximately 150mg. A straight double espresso arrives in less liquid, so it hits faster and feels more intense.
How many flat whites can you safely drink in a day?
EFSA considers up to 400mg a day safe for most healthy adults. At approximately 150mg each, that means a maximum of around two or three flat whites — with other caffeine sources taken into account.
Does decaf espresso have any caffeine?
Yes — approximately 2–5mg per shot. Very low, but not zero. See our decaf guide.
Is matcha a good lower-caffeine alternative to coffee?
Yes — a standard matcha contains about 40–70mg, roughly half a single espresso or a third of a flat white. See our coffee vs matcha energy guide for the full comparison.
All Framberry espresso drinks are made with ethically sourced beans and oat milk as standard. Opening in London in 2027 — join the list.