Caffeine Calculator
Track your daily caffeine intake from coffee, tea, soda, energy drinks, and more. Stay within safe limits and monitor your consumption with our comprehensive caffeine calculator.
Recommendations:
- • Add beverages above to track your caffeine intake
How to Use the Caffeine Calculator
1. Choose Category
Select from coffee, tea, soda, energy drinks, or other caffeinated items.
2. Add Items
Select specific beverages and add them to track your intake throughout the day.
3. Set Your Limit
Choose your category (adult, pregnant, adolescent) to see appropriate daily limits.
4. Monitor Progress
Watch your progress bar and get recommendations to stay within safe limits.
What is Caffeine?
How Caffeine Works
- Adenosine Blocking: Caffeine blocks adenosine receptors, preventing drowsiness
- Stimulation: Increases alertness, focus, and can improve physical performance
- Duration: Effects begin in 15-45 minutes and can last 3-5 hours
- Metabolism: Half-life of 5-6 hours, completely cleared in 8-10 hours
Common Sources
Highest Caffeine
Energy drinks, espresso, strong coffee (150-200mg+)
Moderate Caffeine
Regular coffee, black tea, green tea (25-95mg)
Lower Caffeine
Soda, chocolate, white tea (6-54mg)
Safe Daily Limits
Adults
Healthy adults can safely consume up to 400mg daily
Pregnant
Pregnant women should limit intake to 200mg or less
Adolescents
Teens should limit caffeine to 100mg per day
Children
Caffeine is not recommended for children under 12
Signs of Too Much Caffeine
Physical Symptoms
- • Rapid or irregular heartbeat
- • Jitteriness or tremors
- • Headaches
- • Digestive issues
- • Muscle twitches
Mental Symptoms
- • Anxiety or nervousness
- • Restlessness
- • Irritability
- • Difficulty concentrating
- • Racing thoughts
Sleep Issues
- • Difficulty falling asleep
- • Frequent waking
- • Poor sleep quality
- • Feeling tired despite sleep
- • Insomnia