Private, on-device planning
Plan caffeine around your sleep
Test a drink before you have it, work backwards from bedtime, compare alternatives, or keep a private daily log. These are mathematical estimates, not medical or sleep-safety decisions.
Decision tool
Can I drink this now?
See how much this additional drink contributes at your planned bedtime.
Additional caffeine estimated at bedtime95.0 mg
Approximately 100% of this dose by Choose a valid date and time.