Health
Daily Water Intake Calculator
How much water should you drink every day? Based on your body weight and activity level, get your personalized hydration target.
Daily Water Target
114 oz
fluid ounces
In Cups
14.2
8-ounce cups
In Liters
3.4
liters
Frequently asked questions
Is the '8 glasses a day' rule accurate?
The 8x8 rule (eight 8-ounce glasses) is a general guideline that works for many people, but individual needs vary based on body weight, activity level, climate, and health. This calculator gives you a personalized target based on your specific factors.
Does other beverages count toward my water intake?
Yes — all fluids count toward your daily hydration, including water, coffee, tea, milk, juice, and soup. However, alcohol and caffeinated beverages have mild diuretic effects. Water is still the best choice for pure hydration.
How do I know if I'm drinking enough water?
The simplest sign is urine color: pale yellow indicates good hydration, dark yellow suggests you need more water, and clear may mean you're overhydrated. Thirst is also a reliable indicator — drink when you're thirsty and more when you exercise or in hot weather.
Can I drink too much water?
Yes — overhydration (hyponatremia) is rare but serious. It happens when you drink so much water that your blood sodium drops to dangerously low levels. Endurance athletes are most at risk. Stick to your target range and listen to your body's thirst signals.
Calculate your daily water intake needs with our free hydration calculator. Based on your body weight and activity level, get personalized targets in ounces, cups, and liters.
Proper hydration is essential for energy, focus, digestion, and overall health. Use this calculator to find your ideal daily water intake and build better hydration habits.