Daily Water Intake Calculator
Free daily water intake calculator to find your personalized hydration goal based on weight and activity level.
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Disclaimer: This calculator provides general guidance only. Consult a healthcare professional for personalized medical advice.
Daily Schedule Guide
| Time | Amount |
|---|---|
| Morning | 16 oz (2 cups) |
| Midday | 24 oz (3 cups) |
| Afternoon | 24 oz (3 cups) |
| Evening | 16 oz (2 cups) |
Daily Hydration Tips
A general rule of thumb is to drink half your body weight in ounces of water each day. For example, a 160-pound person should aim for about 80 ounces (10 cups) daily. This is a baseline — your actual needs may be higher.
Exercise, hot weather, and illness all increase your hydration needs. If you're active or live in a warm climate, add 12-16 ounces for every 30 minutes of physical activity to replace fluids lost through sweat.
Carry a water bottle with you throughout the day and drink before you feel thirsty. Monitor your urine color — pale yellow indicates good hydration, while dark yellow means you need more fluids.
Frequently Asked Questions
A general guideline is half your body weight in ounces. For a 150 lb person, that's 75 oz (about 9 cups) daily.
Yes, coffee and other fluids count toward hydration, though caffeine has a mild diuretic effect.
Yes, add 12-16 oz of water for every 30 minutes of exercise to replace fluids lost through sweat.
Yes, water intoxication (hyponatremia) is possible but rare. It typically occurs only with extreme overconsumption.
Yes, many fruits and vegetables have high water content. Watermelon, cucumber, and oranges are excellent sources.
At high altitudes (above 8,000 ft), you lose more water through respiration and may need 1-2 extra cups daily.