Caffeine Intake Calculator
Add up your daily caffeine across espresso, drip, cold brew, and more — and see how it compares to the FDA limit.
The FDA cites 400 mg/day as safe for most healthy adults. Pregnant people are usually advised to stay under 200 mg — talk to your doctor.
Know your daily caffeine
Caffeine varies more than people expect: an espresso shot has about 63 mg, an 8 oz drip coffee about 95 mg, and a 16 oz cold brew 150–240 mg.The FDA cites 400 mg per day as safe for most healthy adults. Pregnant people are usually advised to stay under 200 mg.
See the full breakdown in caffeine in espresso vs cold brew vs drip, and check when it clears with the caffeine half-life calculator.
Frequently asked questions
How much caffeine is safe per day?
The FDA cites 400 mg per day as an amount not generally associated with negative effects in healthy adults — about four 8 oz cups of drip coffee.
Which coffee drink has the most caffeine?
Cold brew is usually the most caffeinated, at 150–240 mg per 16 oz, because it uses a high coffee-to-water ratio and steeps for many hours.
Explore more tools
All tools →Caffeine Half-Life Calculator
See how much caffeine is still in your system at bedtime — and whether that afternoon coffee will cost you sleep.
Coffee Brew Ratio Calculator
Enter your water and ratio to get the exact grams of coffee for a perfectly balanced cup — for any brew method.
Pour Over Ratio Calculator
Dial in the perfect V60, Chemex, or Kalita pour over with the classic 1:16 ratio scaled to your cup.