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Water Intake Calculator

Estimate how much water you should drink each day from your weight and how active you are.

Water per day
2.66 litres
In US cups (8 fl oz)
11.2
In glasses of 250 ml
10.6

What is Water Intake Calculator?

How much water you need depends on your size, activity and the weather. A simple estimate starts from your body weight and adds more for exercise.

What this tool does

Uses about 33 millilitres of water per kilogram of body weight, plus about 350 millilitres for every 30 minutes of exercise. It shows the result in litres, cups and glasses.

How to use it

  1. Enter your weight in kilograms.
  2. Enter your exercise in minutes per day.
  3. Read the daily amount.

Did you know?

  • Water from food and other drinks counts toward your total.
  • Needs rise in hot weather, at altitude, and during illness, pregnancy and breastfeeding.

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