How Much Water to Drink a Day Calculator

Answer: get a daily water intake estimate based on your weight. Free.

How much water to drink a day?

This calculator answers: how much water should I drink a day? It uses your weight and a guideline of about 35 ml per kg of body weight to suggest a daily fluid intake in litres and glasses. You may need more if you exercise a lot or are in a hot climate. This is not medical advice.

Frequently Asked Questions

How much water should I drink a day?

A common guideline is about 35 ml per kg of body weight per day, or 2–2.5 litres for many adults. This calculator uses your weight to estimate daily fluid intake. Activity and climate increase needs.

How much water to drink a day calculator?

Enter your weight in kg; the calculator gives an estimated daily water intake in litres and glasses (250 ml). It is based on a 35 ml per kg guideline. Not medical advice.

Is 2 litres of water a day enough?

For many adults, 2 litres is a reasonable target. Heavier or more active people may need more. This tool adjusts by weight.

Does this include other fluids?

The result is total fluid. Tea, coffee and food with high water content count toward this; plain water is the simplest way to meet it.

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