Wondering when that cup of coffee wears off? Use our caffeine half-life calculator to estimate how much caffeine remains in your system over time. Great for students, health-conscious users, and night owls!
Enter the initial caffeine dose (e.g., 200 mg for a cup of coffee)
Enter the half-life of caffeine (default: 5 hours)
Enter the time since caffeine consumption
Enter your body weight for a personalized estimate
Results
| Parameter | Value |
|---|---|
| Remaining Caffeine | 0 mg |
| Number of Half-Lives | 0 |
| Percent Remaining | 0% |
| Time Until ~0 mg | 0 hours |
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