Water Intake Calculator

The amount of 1.5 liters of water per day is approximate. In order to know how much fluid you need daily, you need to multiply your weight in kg by 30 ml, if you are under 60 years old. For example, a 70 kg person should drink 2100 ml of fluid or 2.1 liters, plus whatever they lose during daily exercise if any. For people over 60, the weight in kg should be multiplied by 25 ml to take into account the decrease in muscle tissue which retains a lot of water. Vigilance is therefore advised, as other factors, such as breastfeeding, fever and very hot temperatures can increase our need for fluid.

Drinks (water, juice, tea, coffee, herbal tea, milk) should meet 60% of these needs. Food should meet 30% of the daily water requirement. In this regard, fruits and vegetables are by far the most water-rich foods with a water concentration varying between 70 and 95%. Meat, poultry, fish, and eggs still contain 50% water. The last 10% comes from metabolism or oxidation reactions.

So, it’s not just pure water that we have to count in our total fluids to absorb over the course of a day, but we must not forget to hydrate regularly.

You can use the water intake calculator below to have an idea of how much water you should drink per day.

Water Intake calculator


You should drink ...... of water per day

*Note: The calculator and information provided here are for guidance purposes only. Your water intake requirements will vary according to your health, activity levels, and whether you are pregnant or breastfeeding.

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