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Water Intake Calculator

Find out exactly how much water you should drink every day based on your body and lifestyle.

Your details

Litres per day

Why hydration matters

Heart and circulation

Water keeps your blood volume healthy so your heart pumps efficiently and nutrients reach every cell.

Energy and focus

Even mild dehydration of 1–2% reduces concentration, memory, and physical performance significantly.

Temperature regulation

Sweating is your body's cooling system. You need water to replace what you lose, especially in hot weather.

Kidney and detox

Your kidneys need water to filter waste. Good hydration helps prevent kidney stones and UTIs.

Pro tip: Spread your intake throughout the day. Drink a glass first thing in the morning, before each meal, and during exercise.