Water Intake Calculator
Estimate how much water to drink each day from your weight and activity level, shown in liters, ounces and cups.
Read the guide: How Much Water Should You Drink a Day?Your details
Units
Daily water target
2.8 L
About 12 cups
- In ounces
- 95 oz
- In cups
- 12 cups
A general guide — needs rise with heat, illness and pregnancy, and some comes from food. Don't over-drink. Informational only, not medical advice.
How it works
- 1
Enter your weight
Add your body weight in metric or imperial.
- 2
Add exercise
Include your typical daily exercise minutes.
- 3
See your target
View your daily water goal in your preferred units.
Instant & 100% private — nothing is uploaded
Every calculation runs locally in your browser. The measurements, dates and details you enter stay on your own device and are never sent to a server — nothing is stored, logged or shared.
Frequently asked questions
- Does all fluid count?
- Yes. Water, other drinks and the water in food all contribute. The target here is a general guide for total intake, not water alone.
- Can you drink too much water?
- Rarely, but yes — drinking far more than you need can dilute your blood sodium. Let thirst and urine color guide you, and don’t force large amounts.
- Is this medical advice?
- No. These calculators are for general information and education only. They are not a diagnosis or a substitute for professional care — talk to a doctor or qualified clinician about your health.