Math
Daily Water Intake
Simple formula — 35 ml per kg. With an adjustment for activity level.
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liters per day
glasses per day (250 ml)
Enter your body weight to calculate
What does Daily Water Intake?
The daily water intake calculator shows the ideal amount of water to drink each day based on body weight and activity level.
How to use Daily Water Intake?
- Enter your body weight in kilograms.
- Select your physical activity level.
- The recommended water intake is shown in liters and glasses.
Key features
- Base formula: 35 ml per kg of body weight
- Multiplier based on physical activity level
- Result in liters and 250 ml glasses
Frequently asked questions
What is the formula based on?
The formula is based on a guideline of 35 ml per kg of body weight per day, adjusted for activity level.
Does the count include other drinks?
The calculation refers to water only. Coffee, tea and other beverages are not included, though some contribute to fluid intake.
Is this tool free?
Yes, this tool is completely free and requires no registration.
Is my data saved?
No. All calculations happen in your browser only — no data is sent to any server.