Water Intake Calculator: How Much Water Should I Drink? | Free
2 useskg
mL / day
Glasses (250mL)
Bottles (500mL)
Liters
Water Intake Tips
Personalized Recommendation
Calculate your optimal daily water intake based on body weight, activity level, and climate conditions.
Activity-Adjusted
More active lifestyles require more water. The calculator adjusts for sedentary to very active levels.
Climate Factor
Hot and humid climates increase water needs. The calculator factors in your local climate conditions.
Multiple Units
See your daily water goal in milliliters, glasses (250mL), bottles (500mL), and liters.
Frequently Asked Questions
How much water should I drink per day?
A general guideline is 35mL per kg of body weight, adjusted for activity and climate. For a 70kg person, that is about 2,450mL (10 glasses).
Does activity level affect water needs?
Yes. Exercise increases water loss through sweat. Active people may need 40-60% more water than sedentary individuals.
Does climate affect how much water I need?
Yes. Hot and humid climates increase water loss, requiring 20-40% more water intake.
Is this calculator free?
Yes, completely free.
What weight units does the water intake calculator accept?
Our water intake calculator primarily uses kilograms (kg) for body weight input to ensure accurate calculations. However, many calculators automatically convert common units like pounds (lbs) or stones into kilograms behind the scenes. Always check the input field's label or a help icon for accepted units to ensure your personalized daily water recommendation is precise.
What specific volume does the water intake calculator consider 'one glass' when displaying my daily recommendation?
Our water intake calculator typically standardizes 'one glass' to a commonly accepted volume, often around 240mL (8 fluid ounces) or 250mL. While we provide results in glasses for convenience, for precise tracking of your personalized daily water intake, we recommend referring to the more exact milliliters (mL) or liters (L) output to match your specific drinking vessels.
How to Calculate Water Intake
- Enter your body weight in kilograms
- Select your daily activity level
- Choose your climate conditions
- View your recommended daily water intake