🧬 Biohacker Tools
Last updated: March 2026
Free calculators to optimize your biology
☕ Caffeine Half-Life Calculator
See when caffeine leaves your system for better sleep
Caffeine at Bedtime (11 PM)
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😴 Sleep Cycle Calculator
Wake up at the end of a cycle feeling refreshed
⏱️ Fasting Timer
Track your intermittent fasting windows
Fasting Status
Set your last meal
🥩 Macro Calculator
Calculate your daily protein, carbs, and fat needs
💧 Water Intake Calculator
How much water you need based on weight and activity
Daily Water Goal
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🔥 BMR & TDEE Calculator
Your basal metabolic rate and daily calorie needs