Daily Water Intake Calculator by Weight
Find out how much water you should drink each day. Enter your weight, activity level and climate to get your personal target in liters and glasses, plus a simple daily drinking schedule.
Your details
Your daily water target
Recommended intake
2.8 L
liters per day
In glasses
11
glasses of 250 ml each
Suggested drinking schedule
| Time of day | Suggested window | Share | Amount | Glasses |
|---|
Tip: keep a water bottle with you and take a few sips every half hour instead of drinking a lot at once. Thirst, dark yellow urine and tiredness are common signs you are drinking too little.
Frequently asked questions
It uses a common evidence-based starting point of 35 milliliters of water per kilogram of body weight per day, which is widely used in nutrition guidance. Then it adds an adjustment for activity (0 to 1,200 ml) and climate (0 to 800 ml), because exercise and heat increase fluid loss through sweat.
Yes. Fruits, vegetables, soups, tea and milk all add water, and about 20 percent of daily fluid usually comes from food. The target shown here is for drinking water, so if you eat a lot of fruit and soups you may need slightly less plain water.
Drinking far more than the target in a short time can be harmful. If you have kidney, heart or other medical conditions, or you take medicines that affect fluid balance, ask your doctor for a personal limit instead of following this general estimate.
Splitting intake evenly through the day keeps hydration steady and avoids drinking large amounts late at night, which can disturb sleep. Drink most of your water between morning and late afternoon, and less in the last two hours before bed.