Loading…
Calculate daily caffeine intake from coffee, tea, energy drinks and soda — see total mg, % of 400mg limit and sleep impact.
Calculate daily caffeine intake from coffee, tea, energy drinks and soda — see total mg, % of 400mg limit and sleep impact.
Enter values above and click Calculate — results will appear here with the formula explained.
Caffeine per 8oz coffee ~95mg, black tea ~47mg, energy drink ~80mg, soda ~40mg. Total is sum times quantity. Limit is 400mg for healthy adults per FDA.
This is estimate; brew strength varies 70-140mg. For YMYL sleep and pregnancy, lower limits apply — consult clinician, not just this tool.
Caffeine half-life is 5-6 hours. Afternoon intake affects sleep quality even if you fall asleep.
Calculate daily caffeine intake from coffee, tea, energy drinks and soda — see total mg, % of 400mg limit and sleep impact. Formula: Total = coffee*95 + tea*47 + energy*80 + soda*40 mg.
Caffeine per 8oz coffee ~95mg, black tea ~47mg, energy drink ~80mg, soda ~40mg. Total is sum times quantity. Limit is 400mg for healthy adults per FDA.
This is estimate; brew strength varies 70-140mg. For YMYL sleep and pregnancy, lower limits apply — consult clinician, not just this tool.
Caffeine half-life is 5-6 hours. Afternoon intake affects sleep quality even if you fall asleep.
With 2 coffees (190mg) +1 tea (47mg) +1 soda (40mg) =277mg total, 69% of 400mg, under limit.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
New tool — content being expanded · Report an error