Find out just how much of this stimulant is in coffee, tea, soda and energy drinks.

By Mayo Clinic Staff

If you're like most adults, caffeine is a part of your daily routine. But do you know the caffeine content of your favorite drinks?

Up to 400 milligrams of caffeine a day is considered safe for most adults. However, people's sensitivity to caffeine varies. If you're bothered by headaches, restlessness or anxiety, you may want to reevaluate your caffeine intake. Also women who are pregnant, trying to become pregnant or breastfeeding are advised to limit their use of caffeine.

Check the charts for an idea of the caffeine content in popular beverages. Drink sizes are in fluid ounces (oz.) and milliliters (mL). Caffeine is shown in milligrams (mg).

Keep in mind that the actual caffeine content of a cup of coffee or tea can vary quite a bit. Factors such as processing and brewing time affect the caffeine level. So use these numbers as a guide.

Coffee drinks Size in oz. (mL) Caffeine (mg)
Brewed 8 (237) 96
Brewed, decaf 8 (237) 2
Espresso 1 (30) 64
Espresso, decaf 1 (30) 0
Instant 8 (237) 62
Instant, decaf 8 (237) 2
Teas Size in oz. (mL) Caffeine (mg)
Brewed black 8 (237) 47
Brewed black, decaf 8 (237) 2
Brewed green 8 (237) 28
Ready-to-drink, bottled 8 (237) 19
Sodas Size in oz. (mL) Caffeine (mg)
Citrus (most brands) 8 (237) 0
Cola 8 (237) 22
Root beer (most brands) 8 (237) 0
Energy drinks Size in oz. (mL) Caffeine (mg)
Energy drink 8 (237) 29
Energy shot 1 (30) 215
Feb. 29, 2020