Caffeine Calculator
Track your caffeine intake and find your safe daily limit.
カフェイン計算機
カフェイン摂取量を管理します。毎日の摂取量を記録し、半減期に基づいて睡眠への影響を分析します。
Caffeine and Your Health
Caffeine is a natural stimulant found in coffee, tea, and cacao plants. It works by stimulating the brain and central nervous system, helping you stay alert and prevent the onset of tiredness.
- Safe Limits: For most healthy adults, up to 400 milligrams (mg) of caffeine a day appears to be safe. That's roughly the amount of caffeine in four cups of brewed coffee.
- Individual Sensitivity: Some people are more sensitive to caffeine than others, experiencing jitters or sleep disruption even with small amounts.
- Hidden Sources: Be aware of caffeine in soft drinks, energy drinks, and some over-the-counter medications.
Using this calculator can help you stay within a healthy range and optimize your caffeine consumption for focus and productivity.