Water Intake Calculator
Calculate how much water you should drink daily based on your weight, activity level, and climate.
Results
Water Intake Formula
Base = Weight (kg) × 33 ml
Adjusted for activity level and climate. More intense activity and hotter climates require more water.
Frequently Asked Questions
How much water should I drink daily?
A general guideline is 33 ml per kg of body weight. A 70 kg person should drink about 2.3 liters daily, adjusted upward for exercise, hot weather, and high altitude.
Does coffee count toward water intake?
Yes, coffee and tea contribute to daily fluid intake. While caffeine has a mild diuretic effect, the water content more than compensates. However, plain water remains the best choice for hydration.