A Toolkit for Mindful Caffeine Consumption
From tracking your daily caffeine load to understanding your genetic tolerance, our caffeine calculators provide the data you need to make smarter choices.
Track your total daily consumption against the 400mg safe limit.
Visualize how long caffeine stays in your system to protect your sleep.
Discover if you are a fast, average, or slow metabolizer.
Find the optimal time to drink caffeine for peak focus on a task.
Your 3-Step Journey to Caffeine Mastery
We provide the tools to transform your relationship with caffeine in three simple, science-backed steps.
Measure Your Intake
You can't manage what you don't measure. The first step is to get an honest look at your daily consumption. Use our Caffeine Intake Calculator to log every coffee, tea, and energy drink. You might be surprised how quickly small doses add up and push you over the recommended 400mg daily limit.
Understand Your Biology
Are you a fast or slow metabolizer? Your genetics are the single biggest factor in how your body handles caffeine. Take our 2-minute Caffeine Sensitivity Test to discover your personal profile. This crucial insight will inform every other decision you make.
Optimize Your Timing
Timing is everything. Use the Caffeine Half-Life Calculator and your sensitivity profile to establish a personal "caffeine curfew" that protects your sleep. For peak productivity, use the Caffeine Timing Optimizer to align caffeine's peak effects with your most important tasks.
Understanding Your Buzz: Coffee vs. Tea vs. Energy Drinks
Not all caffeine is created equal. The source of your caffeine dramatically changes its effect on your body and mind.
Delivers a potent, fast-acting dose of caffeine, ideal for a powerful alertness boost. However, its high concentration can lead to jitters in sensitive individuals. The caffeine content varies wildly by brew method.
Contains L-theanine, an amino acid that promotes a feeling of "calm alertness." This synergy provides a smoother, less anxious energy boost, making it a great choice for sustained focus. Matcha is a particularly potent source.
Often combine very high doses of caffeine with sugar and other stimulants. This can provide a powerful initial rush but often leads to a severe crash. Use our Drink Comparison Tool to see how brands like Red Bull and Monster stack up.
Caffeine and Your Health: A Balanced View
Caffeine is a complex drug with both benefits and risks. Responsible consumption is key to harnessing its power for good.
Athletic Performance
Caffeine is a well-documented ergogenic aid. It can increase endurance, reduce perceived exertion, and improve power output. The key is timing and dosage. Using our Timing Optimizer before a workout can help you peak at the right moment.
Cognitive Function
The primary reason people use caffeine: it enhances alertness, focus, and reaction time. Studies show it can improve performance on a range of cognitive tasks. However, more is not always better. Exceeding your personal limit can lead to anxiety and diminished returns.
Heart Health
For most healthy adults, moderate caffeine intake (under 400mg/day) is not associated with adverse cardiovascular effects. However, slow metabolizers who consume high amounts may have a slightly increased risk of hypertension. High doses can also cause temporary palpitations.
Dependence and Withdrawal
Daily caffeine use leads to physical dependence. When you stop, you can experience headaches, fatigue, and irritability. This is not a sign of weakness, but a predictable neurochemical response. Our Caffeine Withdrawal Tracker is designed to help you avoid this with a comfortable tapering plan.
Your Trusted Source for Caffeine Science
Caffeine is a drug. We treat it with the respect it deserves, providing you with evidence-based tools and information to help you build a healthier, more intentional relationship with it.
Science-Backed
Our tools and articles are built on a foundation of established scientific research. We provide links to relevant studies, empowering you to explore the data and learn more from primary sources. Explore our caffeine articles.
Personal Wellness
There's no one-size-fits-all answer to caffeine. Our tools emphasize personalization, helping you understand your unique tolerance and how caffeine affects your sleep and well-being. Take our Caffeine Sensitivity Test to start.
Empowerment Through Knowledge
Our goal is to give you the knowledge you need to make conscious, mindful decisions. Stop guessing and start optimizing your energy with tools like the Caffeine Intake Calculator.
Debunking Common Caffeine Myths
Caffeine and Alcohol: A Word of Caution
While this site focuses on the positive, optimized use of caffeine, it is crucial to address the risks of mixing caffeine with alcohol. We strongly advise against this practice.
Medical Warning
Mixing caffeine, a stimulant, with alcohol, a depressant, is dangerous. Caffeine can mask the intoxicating effects of alcohol, leading you to feel less drunk than you actually are. This can result in overconsumption of alcohol, impaired judgment, and an increased risk of accidents or alcohol poisoning.
The following table is provided for educational purposes only, to raise awareness of the caffeine content in common alcoholic beverages. A 2005 clinical trial showed psychoactive effects from caffeine doses as low as 9 mg.
| Drink | Caffeine (mg/drink) | ABV |
|---|---|---|
| Espresso martini | ~217 mg | 9.8% |
| Caffè corretto | ~212 mg | 20% |
| Carajillo | ~212 mg | 20 % |
| Buckfast Tonic Wine | ~89 mg | 14.8% |
| Vodka Red Bull | ~60-80 mg | 7.4% |
| Irish coffee | ~80 mg | 9.7% |
| Gunfire | ~41 mg | 6% |
| Rev | ~38 mg | 7% |
| Jägerbomb | ~29 mg | 3.5% |
| Kahlúa (1.5 oz) | ~11 mg | 20% |
| Rum and Coke | ~10 mg | 11.8% |
Source: Publicly available data and product labels. Caffeine content is approximate and can vary based on preparation.