The Daily Caffeine Limit Calculator is a user-friendly tool to help you determine your safe daily caffeine intake. This refers to the maximum quantity of caffeine you can consume without encountering caffeine overdose symptoms.
It’s difficult to establish a specific caffeine quantity suitable for all, as individual responses and sensitivities to caffeine can vary significantly, influenced by factors such as age, medical background, and personal tolerance levels.
Daily Caffeine Limit Calculator
How to use
- Input your age in years. This is crucial as caffeine limits vary significantly across different age groups.
- Provide your body weight. Choose between kilograms (kg) or pounds (lbs). The calculator will automatically convert pounds to kilograms, or vice versa.
- Indicate any existing health conditions. Select from the dropdown menu. These conditions can affect your recommended caffeine intake.
- Indicate pregnancy or lactating status. Pregnancy and lactation are critical factors that influence caffeine safety.
- View results. Click the ‘Calculate’ button to submit your information. The calculator will then display your recommended daily caffeine limit.
Important Notes
- The calculator is a guide based on general health recommendations and should not replace medical advice.
- Always consult a healthcare provider for personalized health advice, especially if you have specific health conditions or concerns.
- The calculator assumes that all inputted data is accurate and does not account for other sources of caffeine intake throughout the day. Users should consider their total caffeine consumption from all sources when using this tool.
Caffeine Limits for Healthy Adults
According to the U.S. Food and Drug Administration (FDA), a maximum of 400 mg of caffeine daily1 is not generally associated with dangerous, adverse effects for healthy adults.
However, it is not recommended to consume more than 200mg in one serving3. Instead, spread it over multiple servings.
The table below shows the amount of 400 mg caffeine servings for some popular drinks.
| Name | Caffeine (mg) | Size | Servings |
|---|---|---|---|
| Starbucks Espresso | 150 | Doppio | 2.7 |
| Starbucks Caffe Americano | 225 | Grande | 1.8 |
| Starbucks Caramel Frappuccino Blended Beverage | 90 | Grande | 4.4 |
| Red Bull Classic | 80 | 8.4 fl. oz (250 ml) | 5.0 |
| Monster Energy | 160 | 16 fl. oz (473 ml) | 2.5 |
| Bang Energy Black Cherry Vanilla | 300 | 16 fl. oz (473 ml) | 1.3 |
| NOS Energy Original | 160 | 16 fl. oz (473 ml) | 2.5 |
| Rockstar Energy Original | 240 | 16 fl. oz (473 ml) | 1.7 |
| Coca Cola Original | 34 | 12 fl. oz (355 ml) | 11.8 |
Caffeine Limits for Individuals with Health Conditions
According to the U.S. Food and Drug Administration (FDA), individuals with existing health conditions such as heart disease or Type 2 diabetes should limit their daily caffeine intake to a maximum of 200 mg4 5 6 7, or consult their medical practitioner concerning caffeine intake.
The table below shows the amount of 200 mg caffeine servings for some popular drinks.
| Name | Caffeine (mg) | Size | Servings |
|---|---|---|---|
| Starbucks Espresso | 150 | Doppio | 1.3 |
| Starbucks Caffe Americano | 225 | Grande | 0.9 |
| Starbucks Caramel Frappuccino Blended Beverage | 90 | Grande | 2.2 |
| Red Bull Classic | 80 | 8.4 fl. oz (250 ml) | 2.5 |
| Monster Energy | 160 | 16 fl. oz (473 ml) | 1.3 |
| Bang Energy Black Cherry Vanilla | 300 | 16 fl. oz (473 ml) | 0.7 |
| NOS Energy Original | 160 | 16 fl. oz (473 ml) | 1.3 |
| Rockstar Energy Original | 240 | 16 fl. oz (473 ml) | 0.8 |
| Coca Cola Original | 34 | 12 fl. oz (355 ml) | 5.9 |
Caffeine Limits for Pregnant or Lactating Women
Pregnant or lactating women should limit their daily caffeine intake to a maximum of 200 mg2, or consult their medical practitioner concerning caffeine intake.
The table below shows the amount of 200 mg caffeine servings for some popular drinks.
| Name | Caffeine (mg) | Size | Servings |
|---|---|---|---|
| Starbucks Espresso | 150 | Doppio | 1.3 |
| Starbucks Caffe Americano | 225 | Grande | 0.9 |
| Starbucks Caramel Frappuccino Blended Beverage | 90 | Grande | 2.2 |
| Red Bull Classic | 80 | 8.4 fl. oz (250 ml) | 2.5 |
| Monster Energy | 160 | 16 fl. oz (473 ml) | 1.3 |
| Bang Energy Black Cherry Vanilla | 300 | 16 fl. oz (473 ml) | 0.7 |
| NOS Energy Original | 160 | 16 fl. oz (473 ml) | 1.3 |
| Rockstar Energy Original | 240 | 16 fl. oz (473 ml) | 0.8 |
| Coca Cola Original | 34 | 12 fl. oz (355 ml) | 5.9 |
Caffeine Limits for Teens (13 to 18 years old)
The maximum caffeine limit for teenagers aged between 13 and 18 years old is 100 mg8 9 10.
Caffeine Limits for Kids Below 12
The maximum caffeine limit for kids below 12 is 0 mg11.
Sources and References
- FDA. (2018, December 12). Spilling the Beans: How Much Caffeine is Too Much? U.S. Food and Drug Administration. https://www.fda.gov/consumers/consumer-updates/spilling-beans-how-much-caffeine-too-much
- Health Direct. (2019, March 19). Caffeine. Healthdirect.gov.au; Healthdirect Australia. https://www.healthdirect.gov.au/caffeine
- EFSA. (2015). What is caffeine? https://www.efsa.europa.eu/sites/default/files/corporate_publications/files/efsaexplainscaffeine150527.pdf
- Temple, J. L., Bernard, C., Lipshultz, S. E., Czachor, J. D., Westphal, J. A., & Mestre, M. A. (2017). The Safety of Ingested Caffeine: A Comprehensive Review. Frontiers in psychiatry, 8, 80. https://doi.org/10.3389/fpsyt.2017.00080
- McGuire S. (2014). Institute of Medicine. 2014. Caffeine in Food and Dietary Supplements: Examining Safety—Workshop Summary. Washington, DC: The National Academies Press, 2014. Advances in nutrition (Bethesda, Md.), 5(5), 585–586. https://doi.org/10.3945/an.114.006692
- Weng, X., Odouli, R., & Li, D. K. (2008). Maternal caffeine consumption during pregnancy and the risk of miscarriage: a prospective cohort study. American journal of obstetrics and gynecology, 198(3), 279.e1–279.e2798. https://doi.org/10.1016/j.ajog.2007.10.803
- Li, J., Zhao, H., Song, J. M., Zhang, J., Tang, Y. L., & Xin, C. M. (2015). A meta-analysis of risk of pregnancy loss and caffeine and coffee consumption during pregnancy. International Journal of Gynaecology and Obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics, 130(2), 116–122. https://doi.org/10.1016/j.ijgo.2015.03.033
- Atkinson, A. (2022, August 3). Your teen and caffeine. UT Physicians. https://www.utphysicians.com/your-teen-and-caffeine/
- Buchholz, D. (2022, August 2). Caffeine and Kids. Columbia University Irving Medical Center. https://www.cuimc.columbia.edu/news/caffeine-and-kids
- Queensland, C. H. (2019, January 22). Should my child be drinking caffeine? Children’s Health Queensland. https://www.childrens.health.qld.gov.au/about-us/news/feature-articles/should-my-child-be-drinking-caffeine
- Clinic, C. (2022, May 6). Is Caffeine Bad for Kids? Cleveland Clinic; Cleveland Clinic. https://health.clevelandclinic.org/is-caffeine-bad-for-kids