💧 Health & Lifestyle
💧 Daily Water Intake & Hydration Calculator
Find out exactly how much water your body needs each day to stay energized, focused, and healthy.
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✓ 2026 Edition
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Disclaimer for all Boulevibe Tools & Calculators
General hydration recommendations. People with kidney or cardiovascular conditions should follow medical advice.
📖 How water requirements are determined
Health authorities generally recommend approximately 30 to 35 ml of fluid per kilogram of body weight, plus 500 to 1,000 ml per hour of active exercise.
Formula: Daily Water (Liters) = Body Weight (kg) × 0.035 + (Workout Minutes / 60) × 0.6
📊 Hydration guidelines by body weight
| Body Weight | Baseline Need (Rest Day) | With 1h Exercise | Hot Summer Days (>82°F / 28°C) |
|---|---|---|---|
| 120 lbs / 55 kg | approx. 1.9 liters (64 oz) | approx. 2.5 liters (85 oz) | approx. 2.9 liters (98 oz) |
| 155 lbs / 70 kg | approx. 2.5 liters (85 oz) | approx. 3.1 liters (105 oz) | approx. 3.5 liters (118 oz) |
| 185 lbs / 85 kg | approx. 3.0 liters (101 oz) | approx. 3.6 liters (122 oz) | approx. 4.0 liters (135 oz) |
| 220 lbs / 100 kg | approx. 3.5 liters (118 oz) | approx. 4.1 liters (139 oz) | approx. 4.5 liters (152 oz) |
💡 Tips to stay well-hydrated throughout the day
- Drink a glass of water upon waking: Rehydrate immediately after 7 to 8 hours of sleep to kickstart your metabolism and cognitive focus.
❓ FAQ – Daily Water Intake Calculator
💬 Do coffee and tea count toward my daily water intake?
Yes! Contrary to popular myth, moderate tea and coffee consumption contributes positively to daily hydration.