How is this calculated?

Baseline: ~35 mL per kg bodyweight (≈0.5 oz/lb). Additions: +350 mL per 30 minutes of exercise, +10% for hot climate. Rounded to reasonable daily totals.

Does coffee or tea count?

Yes — most fluids contribute to hydration. The old 'coffee dehydrates you' claim is largely a myth for habitual drinkers; net fluid gain is positive.

Can I drink too much water?

Yes. Drinking several liters in a short time can dilute sodium (hyponatremia). Spread intake across the day and don't force volumes you don't need.

Is this medical advice?

No. This tool is for informational purposes only and is not a substitute for advice from a registered dietitian or physician.

Water Intake Calculator

Health & Fitness· 18 tools

Free daily water intake calculator. Enter your bodyweight, activity minutes, and climate to get a personalized daily water recommendation in liters, ounces, and standard glasses.

Units

Weight (kg)

Exercise (minutes/day)

Climate

Recommended daily intake

2.80 L

Low

Avg

Active

High

Fluid ounces

94.7 oz

Glasses (250 mL)

11.2

Milliliters

2,800

Informational estimate only. Not medical advice. All fluids (water, tea, coffee, foods) contribute to total hydration.

Disclaimer: For informational purposes only. This is not medical advice — consult a qualified healthcare provider for personal recommendations.

Frequently Asked Questions

References

Water & Healthier Drinks — Centers for Disease Control and Prevention
Dietary Reference Intakes for Water — National Academies of Sciences, Engineering, and Medicine

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Frequently Asked Questions

References and sources

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