FREE USA CALCULATORS Calculator Guides
Fluid Hydration

Water Intake Calculator: How Much Water Do You Need?

Personalized hydration targets based on clinical guidelines.

Never guess whether you are drinking enough water.

FREE USA CALCULATORS Calculator Guides
The Calculation

Weight + Exercise Adjustments

Base Guideline: Approximately 0.5 to 0.7 ounces per pound of body weight.

Exercise Bonus: Add 12–16 ounces for every 30 minutes of vigorous physical activity.

Climate Bonus: Add 10–15% in hot or humid environments.

Clinical Guideline

Adequate hydration boosts metabolic efficiency and reduces false hunger signals.

FREE USA CALCULATORS Calculator Guides
Hydrate Smarter

Get Your Personalized Daily Target

Calculate how many glasses, ounces, and liters of water you should drink daily.

Educational tool only. Does not replace individualized clinical diagnosis.

Calculate Your Water Intake