Water Intake Calculator

How the Water Intake Calculator Works

This calculator estimates your daily water needs based on your body weight, activity level, and climate. These factors help determine how much hydration your body requires to function optimally throughout the day.

Formulas Used

The calculator uses a simple and widely accepted hydration model:

• Base Water Intake: weight (kg) × 0.033 liters
• Activity Adjustment: + 0–0.7 liters depending on exercise level
• Climate Adjustment: + 0–0.6 liters depending on temperature
• Total Water Intake: base + activity + climate

Example

Example for a 70 kg person, moderate activity, warm climate:

Base:     70 × 0.033 = 2.31 L
Activity: + 0.35 L
Climate:  + 0.30 L

Total:    2.96 liters/day (≈ 12.5 cups)