These figures apply CaffCalc’s exponential model to the adjusted 200 mg starting value. They are calculations, not measurements of caffeine in a particular person.
Calculated caffeine remaining from a 200 mg serving
Hours elapsed
3-hour half-life
5-hour half-life
7-hour half-life
0
200 mg
200 mg
200 mg
3
100 mg
132.0 mg
148.6 mg
5
63.0 mg
100 mg
121.9 mg
8
31.5 mg
66.0 mg
90.6 mg
10
19.8 mg
50 mg
74.3 mg
12
12.5 mg
37.9 mg
61.0 mg
With the central five-hour model, the estimate falls below 25 mg after approximately 15.0 hours. The faster and slower columns show why one fixed clearance time shouldn’t be treated as a personal fact.
Use this caffeine value
Use this amount in a calculation, or save the drink to your tracker on this device.
Here are some drinks in the same category with less listed caffeine. This compares caffeine only, not overall health benefits. Check each drink’s source note before choosing.
