Caffeine Content Estimator
Estimate total caffeine intake from coffee, tea, espresso, and energy drinks. See how your intake compares to the FDA daily maximum and how long it takes to metabolize.
Inputs
Results
Total Caffeine
192 mg
How to Use This Calculator
- Select the caffeine source (drip coffee, espresso, black tea, green tea, or energy drink).
- Enter the number of servings and serving size in ounces.
- The calculator shows total caffeine in mg, per-serving amount, percentage of the 400 mg FDA daily maximum, and hours to metabolize.
- Stay below the 400 mg daily limit; cut off consumption at least 6 hours before bedtime.
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