Conditions & Activity

Above 20°C increases water needs

Water Loss Estimate

- liters Est. Water Loss
- liters Water Needed
- Dehydration Risk
Enter conditions to calculate water requirements.

💧 Water Loss Factors

  • Base loss: ~1.5L/day at rest (breathing, sweating, waste)
  • Activity: +500ml per hour of moderate exertion
  • Heat: +250ml per hour for every 5°C above 20°C
  • Altitude: +500ml per hour above 3000m elevation
  • Dry air: Additional 200-400ml/hr in arid conditions
Dehydration Signs
  • Thirst (already 2% dehydrated)
  • Dark urine, decreased output
  • Headache, fatigue, dizziness
  • Rapid heart rate, confusion
  • Severe: seizures, unconsciousness