Coach Track

Water Intake Calculator

Estimate your daily water needs

Estimate a daily hydration range using weight, activity, and climate assumptions.

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Your Water intake result

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Method preview

Weight-based estimate adjusted for activity and climate. The result is an estimate and includes its limitations.

01

Daily Water Needs

Water needs vary based on weight, activity level, climate, and other factors. The calculator provides a personalized estimate.

02

What changes your needs?

Food, exercise, temperature, pregnancy, medication, illness, and individual physiology can all change hydration needs.

03

Hydration Tips

Spread your water intake throughout the day. Monitor your urine color - pale yellow indicates good hydration.

Method and sources

Method: Weight-based estimate adjusted for activity and climate.

Supported population: Generally healthy adults without fluid restrictions or unusual hydration needs.

Assumptions:
  • Thirty milliliters per kilogram is a planning baseline
  • Activity and climate multipliers are broad categories
Dietary Reference Intakes for WaterNational Academies Press
Reviewed 2026-07-16
Read the complete methodology

Frequently asked questions

How is the Water intake estimate calculated?

Weight-based estimate adjusted for activity and climate.

What are the limitations of this Water intake estimate?

Hydration needs vary with diet, health, pregnancy, medication, weather, and exercise. This is general guidance only.