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Water Intake Calculator

Find out exactly how much water you should drink each day based on your body and lifestyle.

💧 Your Details
70 kg
30 yrs
Daily Water Intake
0
litres per day
0
ml/day
0
Glasses
0
Bottles (500ml)
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💧 Hydration Tips

About This Water Intake Calculator

This water intake calculator estimates how much water you may need each day based on your weight, age and activity level. Staying hydrated supports energy, concentration, digestion and temperature control.

This is general information only and not medical advice. Your needs change with climate, exercise and health. Much of your fluid also comes from food and other drinks. Drink to thirst and check with your GP if you have a condition affecting fluid intake.

Frequently Asked Questions

How much water should I drink a day?+
A common guide is around 2–3 litres for adults, but it varies with body size, activity and weather. Thirst and pale urine are useful everyday signs.
Does food count towards hydration?+
Yes. Many foods, especially fruit and vegetables, contain water, and other drinks contribute too. The total from all sources is what matters.
Can I drink too much water?+
Rarely, but drinking very large amounts in a short time can be harmful. For most people, drinking to thirst keeps you safely hydrated.

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RELATED GUIDE

How Much Water Should You Really Drink?

The truth about daily water intake: where the '8 glasses a day' rule came from, what really determines your needs, and simple signs of good hydration.

Read the full guide →