The general recommendation is about 2 to 3 liters (2000-3000 ml) per day for adults, roughly 8-12 cups. However, individual needs vary based on body weight, activity level, climate, and overall health. A good rule of thumb is to drink when you're thirsty and check that your urine is light yellow or clear. Use this tracker to set a personalized goal that fits your lifestyle.

Optimal hydration timing includes: first thing in the morning to rehydrate after sleep, 30 minutes before meals to aid digestion, before and after exercise to replenish fluids, and throughout the afternoon to maintain energy levels. Avoid drinking large amounts right before bed to prevent sleep disruption from bathroom visits.

Key signs of adequate hydration include: light-colored or clear urine, regular urination (every 2-4 hours), elastic skin that bounces back quickly when pinched, and absence of thirst. Signs of dehydration include dark urine, dry mouth, fatigue, headaches, and dizziness. Tracking your intake with this logger helps you build consistent hydration habits.

Yes, most beverages contribute to your daily fluid intake, including coffee, tea, juice, and milk. While caffeine has a mild diuretic effect, the water content in these drinks more than compensates. However, plain water remains the healthiest choice — it's calorie-free, sugar-free, and the most effective for hydration. Alcoholic beverages, on the other hand, are dehydrating and should not be counted toward your goal.

Yes, overhydration (hyponatremia) is possible, though rare in healthy individuals. It occurs when you drink excessive amounts of water, diluting sodium levels in the blood. Symptoms include nausea, headache, confusion, and in severe cases, seizures. For most people, staying under 800-1000 ml per hour is safe. Listen to your body — drink when thirsty and avoid forcing excessive amounts. If you have kidney issues or take certain medications, consult your doctor about optimal fluid intake.

During exercise or in hot climates, you lose more water through sweat. Drink 500-600 ml of water 2-3 hours before exercise, another 200-300 ml every 10-20 minutes during activity, and 500-700 ml after exercise for every pound of body weight lost. For intense workouts lasting over an hour, consider electrolyte-rich drinks to replenish sodium, potassium, and magnesium. Increase your daily goal in this tracker on active or hot days.