Water Intake Calculator
Calculate your recommended daily water intake based on body weight, activity level, and climate. Results in ounces, cups, liters, and ml.
Frequently asked
questions
A common guideline is to drink 0.5–1 oz of water per pound of body weight (30–35 ml per kg). The US National Academies recommends about 3.7 liters (125 oz) for men and 2.7 liters (91 oz) for women per day from all sources including food.
Yes, despite being mild diuretics, coffee and tea still contribute to your total fluid intake. Caffeinated beverages can count, though pure water is preferable. Alcohol does not count as it causes net fluid loss.
Yes. You should drink an additional 1.5–2.5 cups (12–20 oz) of water for each hour of moderate exercise, and more for intense exercise or hot/humid conditions.