Hydration Calculator
Personalized daily fluid targets based on metabolic demand and activity.
Hydration Tip
"Drink consistently throughout the day. If you feel thirsty, you are likely already slightly dehydrated."
Total Daily Goal
Target Breakdown
Why Hydration Matters
Cognitive Performance
Even 1-2% dehydration can slow your reaction time and focus.
Temperature Regulation
Ensures your body can sweat effectively during heat or exercise.
Waste Removal
Crucial for kidney function and clearing metabolic byproducts.
Glass Size Matters
The calculation uses a standard glass size of 250ml. Larger tumblers or water bottles (e.g., 750ml) mean you only need to drink 4 of them per day.
Sweat & Activity
Exercise increases fluid loss through sweat and respiration. We add approximately 500ml of water for every 30 minutes of moderate activity.
Climate Impact
Hot or humid climates increase your metabolic rate and perspiration even at rest. Our formulas adjust targets based on environmental stress.
Consistent Intake
Hydration is about consistency. Spacing your intake throughout the day is more effective than drinking large amounts at once.