These figures apply CaffCalc’s exponential model to the adjusted 34 mg starting value. They are calculations, not measurements of caffeine in a particular person.
Calculated caffeine remaining from a 34 mg serving
Hours elapsed
3-hour half-life
5-hour half-life
7-hour half-life
0
34 mg
34 mg
34 mg
3
17 mg
22.4 mg
25.3 mg
5
10.7 mg
17 mg
20.7 mg
8
5.4 mg
11.2 mg
15.4 mg
10
3.4 mg
8.5 mg
12.6 mg
12
2.1 mg
6.4 mg
10.4 mg
With the central five-hour model, the estimate falls below 25 mg after approximately 2.2 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.
