Caffeine Remaining Calculator

Consumed at9/1/2025, 6:57:00 PM
Now9/1/2025, 6:57:35 PM
Elapsed0.01 hours
Half-life5 hours (assumed average)
Initial mg200 mg
Remaining mg199.73 mg
Remaining %99.86%
Daily Intake %50.00% of 400 mg
Still OK today200 mg remaining (of 400 mg)

Note: Individual caffeine metabolism varies; this is an estimate.