Daily Water Intake CalculatorCalculate your optimal daily water intake for peak performance, health, and recovery.
Input Data
Body Weight (kg)
Activity Level
1. Why Proper Hydration MattersWater makes up 60% of your body weight and is essential for every bodily function. Proper hydration affects performance, recovery, cognitive function, and overall health.
🧠 Brain FunctionEven 2% dehydration impairs concentration and memory
💪 PerformanceDehydration reduces strength and endurance by 10-15%
🔄 RecoveryWater helps transport nutrients and remove waste
2. Activity-Based Water Requirements
Activity LevelMultiplierExample (70kg person)Why More Water?
Sedentary1.0x2.45LBasic metabolic needs
Light Exercise1.2x2.94LSweat loss replacement
Regular Exercise1.5x3.68LIncreased sweat rate
Intense Training1.8x4.41LHigh sweat losses
3. Signs of Proper Hydration
✅ Well Hydrated
  • • Pale yellow urine
  • • Urinating every 2-4 hours
  • • Moist lips and mouth
  • • Good energy levels
  • • Skin snaps back quickly when pinched
⚠️ Dehydrated
  • • Dark yellow/amber urine
  • • Infrequent urination
  • • Dry mouth and lips
  • • Fatigue and headaches
  • • Slow skin recoil
4. Hydration Timing Strategy
🌅 Morning (Upon Waking)500-750ml to rehydrate after 8 hours without water
🏋️ Pre-Workout (2 hours before)400-600ml to ensure optimal hydration status
💧 During Exercise150-250ml every 15-20 minutes during intense exercise
🔄 Post-Workout150% of fluid lost (weigh yourself before/after)
5. Factors That Increase Water Needs
  • 🌡️
    Hot Weather: +500-1000ml per day
  • 🏔️
    High Altitude: +500ml per day above 2500m
  • 🤒
    Fever: +200ml per degree above 37°C
  • 🤱
    Pregnancy/Breastfeeding: +300-700ml
  • Caffeine/Alcohol: Match intake 1:1
  • 🧂
    High Sodium Diet: +200-400ml