Water Intake Calculator
Find out how much water you should drink each day based on your weight and activity.
Fluid Ounces / day
Milliliters / day
Cups / day
💧 Hydration Schedule
Frequently Asked Questions
How much water should I drink per day?▼
The general rule is to drink 0.5–1 oz of water per pound of body weight daily. The classic '8 glasses a day' is a reasonable baseline but doesn't account for individual factors like weight, activity, and climate.
Does coffee and tea count toward my water intake?▼
Yes, beverages containing water (coffee, tea, juice) contribute to your daily hydration. However, caffeinated drinks have a mild diuretic effect. Water, herbal tea, and water-rich foods (cucumber, watermelon) are the best sources.
What are signs of dehydration?▼
Mild dehydration: thirst, dark yellow urine, fatigue, headache. Moderate: dizziness, dry mouth, decreased urine output. Severe: rapid heartbeat, confusion, fainting. Check your urine — pale yellow means well hydrated.
Can you drink too much water?▼
Yes, but it's rare in healthy adults. Hyponatremia (water intoxication) occurs when you drink excessive amounts and dilute sodium levels. Endurance athletes in particular should balance water with electrolytes during long events.