Coffee Kick Calculator
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The Coffee Kick Calculator helps you plan up to five caffeinated drinks by time, drink type, and number of servings. It uses the published caffeine amounts for common coffee, tea, soda, energy drinks, and energy shots, then shows a transparent time-series estimate.
How to use it
Enter how long you slept and when you woke up. Choose how many caffeine drinks you plan, then set the time, beverage, and servings for each dose. Select alertness, response time, or reaction speed as the display metric.
Important limitation
The original reference calculator uses the U.S. Army Unified Model of Performance. This local implementation does not claim to reproduce that research algorithm. It is a caffeine-decay and sleep-loss planning proxy and must not be used to judge fitness for driving or other safety-critical work.
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