Coffee Kick Calculator
Calculate your optimal caffeine intake and cutoff time for better sleep.
Complete User Guide
Step 1: Enter your body weight.
Step 2: Select your caffeine sensitivity level.
Step 3: Optionally enter your planned sleep time.
Step 4: Get your safe daily caffeine limit and last coffee cutoff time.
The Mathematical Formula
Max Safe = Weight * Sensitivity Factor; Cutoff = Sleep Time - HalfLife Buffer
Safe caffeine limit is approximately 3-6mg per kg of body weight, adjusted for sensitivity. Caffeine has a half-life of 5-6 hours, so cutoff time is calculated to allow sufficient clearance before sleep.
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