Water Intake Calculator
Estimate how much water you should drink per day based on your body weight, exercise, and climate.
Your details
Recommended daily water intake:
Equivalent to: cups (8 oz) / fl oz / × 500 ml bottles
How this is estimated
Baseline of 35 mL per kg of body weight, plus roughly 350 mL for every 30 minutes of exercise, plus an extra 500 mL in hot or humid climates. This is a general guideline — individual needs vary, and food, caffeine, and medical conditions also affect hydration needs.