Water Intake Calculator

Find out how much water you should drink daily based on your weight, activity, and climate.

--
Liters / Day
--
Glasses (250ml)
--
Ounces

Your daily glasses:

Hydration Tips for You

How to Use the Water Intake Calculator

  1. Enter your weight in kilograms. The calculator uses 33 ml per kg as a baseline.
  2. Select your activity level. Exercise increases water needs by 300ml to 1 liter depending on intensity.
  3. Choose your climate. Hot and humid weather adds about 500ml. Cold weather slightly reduces needs.
  4. Click Calculate to see your recommended intake in liters, glasses, and ounces.

Why Hydration Matters

Water makes up about 60% of your body weight. It is essential for digestion, nutrient absorption, circulation, temperature regulation, and joint lubrication. Even mild dehydration (1-2% body weight) can cause fatigue, headaches, and reduced concentration.

In India's climate, especially during summer (April-June), dehydration is a common risk. Carry a 1-liter water bottle and refill it 2-3 times a day. Start your morning with 2 glasses of warm water to kickstart your metabolism.

Frequently Asked Questions

How much water should I drink daily?

A general guideline is 30-35 ml per kg of body weight. A 70 kg person needs about 2.1 to 2.5 liters per day. Add 500ml to 1 liter extra for exercise or hot weather.

Does coffee or tea count toward water intake?

Yes, caffeinated beverages contribute to your daily hydration despite being mild diuretics. However, plain water should be your primary source of hydration.

What are signs of dehydration?

Dark yellow urine, dry mouth, headache, fatigue, dizziness, and reduced urine output. Clear or light yellow urine indicates good hydration.

Can I drink too much water?

Yes, overhydration (hyponatremia) is dangerous and can dilute sodium levels in your blood. Do not exceed 1 liter per hour. Listen to your body and drink when thirsty.

How much water should I drink in Indian summer?

In India's hot climate (especially April-June), add 500ml to 1 liter extra to your baseline. If you sweat heavily or work outdoors, you may need 3-4 liters daily.

More Free Tools