Free online caffeine calculator. Track your daily caffeine intake from coffee, tea, energy drinks, soda, and more. Extensive database of caffeine content for popular beverages (espresso, americano, latte, green tea, black tea, Red Bull, Monster, etc.). Shows safe intake ranges (adult recommendation ≤400mg/day). Supports custom drinks and daily logging. Perfect for health management, pregnancy awareness, coffee enthusiasts, and supplement users. Client-side only, no data upload.