Caffeine Calculator


Your maximum is cans per day.

Based on serving

Did you know?

Caffeine acts as a central nervous system stimulant which it promotes alertness in the brain. When you take caffeine, you will notice feeling more awake and less tired. In fact, caffeine is a common ingredient in medications to treat or manage drowsiness, headaches, and migraines.

While it only takes 45 minutes for 99% of the caffeine, you will feel effects from the average energy drink or coffee for up to 4 to 6 hours. Keep this in mind when you are going to sleep. In addition to helping your brain stay alert, caffeine can delay your normal circadian sleep pattern by 40 minutes according to leading research from the MRC Laboratory of Molecular Biology. When consumed too close to bedtime, caffeine can throw a person’s entire circadian rhythm off.

Disclaimer is brought to you by Resident. Our company sells Nectar, DreamCloud, Awara, Level Sleep, and Home Well Designed. While we intend for this site to be an educational and useful resource for consumers interested in sleep-related topics, we also promote our family of brands – brands that we believe in – on this website. Where we have commissioned independent research and/or articles to support our content, we will state as such in the sub-heading of the article. Where we compare our brands and products against others, we will provide the review criteria as well as state our basis for choosing the “best” or “top” product in a link accompanying the comparison. Our aim is to assist consumers in choosing the best solution for getting restful and comfortable sleep and it is our belief that there is a Resident product that meets any sleeper’s needs.