Water Intake Calculator
Estimate your daily water needs from body weight, exercise and weather.
What is the Water Intake Calculator?
Water needs vary with body size, activity and temperature. Hot Indian summers increase fluid loss through sweat.
How does it work?
A base of 35 ml per kg is increased by about 350 ml per 30 minutes of exercise and 500 ml for hot weather.
Formula
Water = 35 ml × kg + 350 ml × (exercise min ÷ 30) + 500 ml (hot)
Example
70 kg with 30 minutes of exercise: 2,450 + 350 = 2.8 litres; 3.3 litres in hot weather.
Frequently asked questions
Do tea and coffee count?
Yes, moderately. Food, milk, tea and other drinks all contribute to hydration.
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