â Caffeine Half-Life Calculator
Calculate how much caffeine remains in your system.
Caffeine Intake
â Coffee: ~95mg | â Espresso: ~63mg | ðµ Tea: ~47mg | 𥀠Cola: ~35mg
Caffeine Status
Caffeine Remaining
200 mg
100% of original
Time Until Sleep-Safe (<100mg)
~5.0 hours
Caffeine half-life: ~5 hours