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Daily Water Intake Calculator

Health
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Estimates the daily water intake needed for optimal hydration, considering factors like weight, activity level, and climate.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Weight, Activity Level, and Climate in the units shown.

Step 2

Read Daily Water Intake in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Sedentary, Temperate

Weight: 150 pounds; Activity Level: Sedentary (little to no exercise); Climate: Temperate

Daily Water Intake: 75 fluid ounces; Daily Water Intake: 2.2180125 liters

Lightly Active, Hot

Weight: 180 pounds; Activity Level: Lightly Active (light exercise/sports 1-3 days/week); Climate: Hot

Daily Water Intake: 148.5 fluid ounces; Daily Water Intake: 4.39166475 liters

Moderately Active, Temperate

Weight: 200 pounds; Activity Level: Moderately Active (moderate exercise/sports 3-5 days/week); Climate: Temperate

Daily Water Intake: 155 fluid ounces; Daily Water Intake: 4.5838925 liters

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.