Water keeps every system in your body running — from temperature regulation to digestion and joint lubrication. Most adults need 2.5–3.5 litres a day, but the exact number depends on body weight, climate and activity. The InstantTool water intake calculator uses 35 ml/kg of body weight plus an extra ~350 ml per 30 minutes of exercise.
Water keeps every system in your body running — from temperature regulation to digestion and joint lubrication. Most adults need 2.5–3.5 litres a day, but the exact number depends on body weight, climate and activity. The InstantTool water intake calculator uses 35 ml/kg of body weight plus an extra ~350 ml per 30 minutes of exercise.
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Browse all toolsWater Intake Calculator calculations are a part of daily life for Indian households. A reliable calculator helps avoid errors, supports accurate financial decisions and ensures compliance with the latest Indian standards and tax rules.