How much caffeine are you drinking?
Coffee, tea, energy drinks, pre-workout - it adds up faster than you think. Tally a typical day and see your total against the everyday adult reference and the lower pregnancy figure.
Free access to the Caffeine in Drinks tool.
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Method & sources
Each drink uses a typical published caffeine value (averages from USDA FoodData Central, FDA, and manufacturer data); real amounts vary widely with brew method, brand, and cup size. Your running total is compared against the FDA's ~400 mg/day reference for healthy adults and the ≤200 mg/day figure used in pregnancy, with a flag when any single item is a large dose (~200 mg or more).
- FDA. Spilling the Beans: How Much Caffeine is Too Much? (~400 mg/day for healthy adults).
- USDA FoodData Central - caffeine values for coffee, tea, and beverages.
- Mayo Clinic. Caffeine content for coffee, tea, soda and more.
- ACOG. Moderate caffeine consumption during pregnancy (≤200 mg/day).
- EFSA. Scientific Opinion on the Safety of Caffeine (2015) - single doses ≤200 mg.
How much caffeine is "a lot"?
For most healthy adults, the FDA points to about 400 mg of caffeine a day as an amount not generally tied to negative effects - roughly four to five cups of brewed coffee. That is a population reference, not a personal target, and people who are sensitive may feel plenty from far less.
Pregnancy is the common exception: major obstetrics guidance suggests keeping caffeine under about 200 mg a day, and health authorities also advise that single doses over ~200 mg can be a lot in one sitting. If pregnancy applies to you, your provider's advice comes first.
It is not just coffee
Tea, energy drinks, soda, dark chocolate, and especially pre-workout powders and energy shots all add to the total. A single scoop of pre-workout or one energy shot can carry as much caffeine as two or three coffees - easy to forget when you have already had a morning cup. (And no, dark-roast coffee does not have more caffeine than light roast; by volume it is about the same.)
Timing matters too - try the Caffeine Clock
How much you have is only half the story; when you have it is the other half. Caffeine has a half-life of about five hours, so an afternoon total can still be working against your sleep at midnight. The Caffeine Clock estimates your personal cut-off time.