Water calculatorHow much water do you need?
Based on your weight, your exercise and the heat. In litres and glasses.
Water a day
3.2 l
- 250 ml glasses
- 13
4You does this for you and adjusts it as your weight changes.
How it's calculated
A starting point is about 35 ml per kilogram of bodyweight a day, plus about 0.6 litres per hour of exercise and half a litre more on hot days. Every drink counts, not just water.
FAQ
Should I drink 2 litres a day?
It's a reasonable rough figure for many adults, but it depends on your weight, activity and climate.
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