
Does Coffee Count Toward Your Water Intake?
Caffeine has a reputation for causing dehydration. Here's what the science actually says about coffee, tea, and your daily fluid total.
Estimate your daily water intake target based on your body and activity level.
Results update instantly as you adjust.
≈ 10 glasses (250 ml each)
Based on 31 ml per kg of body weight, plus 12 ml for every minute of exercise — a baseline drawn from EFSA adequate-intake guidance and ACSM exercise-hydration recommendations. Hot climates, illness, or pregnancy can raise your needs further.
Read more in How Much Water Should You Drink?.

Caffeine has a reputation for causing dehydration. Here's what the science actually says about coffee, tea, and your daily fluid total.

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