Skip to content
HQ8T

Water Intake Calculator

How much water to drink each day.

kg
minutes
Drink per day
2.6 litres
Glasses (250 ml)
11
Bottles (1 litre)
2.6

General guide for healthy adults. Follow your doctor’s advice if you have a medical condition.

How to use

  1. 1Enter your body weight.
  2. 2Add how many minutes you exercise on a typical day.
  3. 3Tick “Hot weather” in summer or if you sweat a lot.
  4. 4See your daily target in litres and 250 ml glasses.

Frequently asked questions

How is daily water intake calculated?

About 35 ml per kg of body weight, plus roughly 12 ml per minute of exercise, plus 500 ml in hot weather. It's a general guide for healthy adults.

Does tea, milk or food count?

Yes. Milk, buttermilk, soups, fruits and even tea contribute. About 20% of daily water usually comes from food.

How do I know I'm drinking enough?

Pale yellow urine and rarely feeling thirsty are good signs. Dark urine can mean you need more water.

Can I drink too much water?

Yes, very large amounts in a short time can be harmful. Spread your water through the day. People with kidney or heart conditions should follow their doctor's advice.

Is this medical advice?

No. It's a general estimate. Ask a doctor if you have a medical condition.

You may also need