How much caffeine is in your cup? (2024)

Caffeine content for coffee, tea, soda and more

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) 71.9
Energy shot 2 (60) 215

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April 26, 2022

  1. Lieberman HR, et al. Daily patterns of caffeine intake and the association of intake with multiple sociodemographic and lifestyle factors in U.S. adults based on the NHANES 2007-2012 surveys. Journal of the American Academy of Nutrition and Dietetics. 2019; doi:10.1016/j.jand.2018.08.152.
  2. Grosso G, et al. Coffee, caffeine, and health outcomes: An umbrella review. Annual Review of Nutrition. 2019; doi:10.1146/annurev-nutr-071816-064941.
  3. Is your kid over-caffeinated? Academy of Nutrition and Dietetics. https://www.eatright.org/food/nutrition/healthy-eating/is-your-kid-over-caffeinated. Accessed Feb. 1, 2020.
  4. Spilling the beans: How much caffeine is too much. Food and Drug Administration. https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much. Accessed Sept. 20, 2019.
  5. 2015-2020 Dietary Guidelines for Americans. U.S. Department of Health and Human Services and U.S. Department of Agriculture. http://health.gov/dietaryguidelines/2015/guidelines. Accessed Feb. 1, 2020.
  6. Duyff RL. Think your drinks. In: Academy of Nutrition and Dietetics Complete Food and Nutrition Guide. 5th ed. Houghton Mifflin Harcourt; 2017.
  7. Branum AM, et al. Trends in caffeine intake among US children and adolescents. Pediatrics. 2014; doi:10.1542/peds.2013-2877.
  8. USDA Food Data Central. U.S. Department of Agriculture, Agricultural Research Service. https://fdc.nal.usda.gov/index.html. Accessed April 18, 2022.
  9. Bordeaux B. Benefits and risks of caffeine and caffeinated beverages. https://www.uptodate.com/contents/search. Accessed March 16, 2022.
  10. Zeratsky KA (expert opinion). Mayo Clinic. Feb. 5, 2020.
  11. Wikoff D, et al. Systematic review of the potential adverse effects of caffeine consumption in healthy adults, pregnant women, adolescents, and children. Food and Chemical Toxicology. 2017; doi: 10.1016/j.fct.2017.04.002.

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