Health & Fitness · Free Online Tool
Caffeine Half-Life Calculator
Track hepatic CYP1A2 first-order clearance, decay curves, and residual bedtime caffeine levels to safeguard sleep architecture.
Presets:
Projected Bedtime Caffeine Level
50 mg
Currently 114.9 mg circulating in bloodstream.
Sleep Disruptive (>50 mg)
Adenosine receptor blockade will subside in approximately 11 hours.
Current Level
114.9 mg
Level at Bedtime
50 mg
Half-Life (t½)
5 hrs
Time to Optimal (<25mg)
11 hrs
Metric Distribution Analysis
Current Level 114.9
Level at Bedtime 50
Half-Life (t½) 5
Time to Optimal (<25mg) 11
Frequently Asked Questions
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