Daily Water Intake Calculator
Calculate your recommended daily water intake based on body weight and activity level for optimal hydration.
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Hydration Needs Based on Weight & Activity
The Daily Water Intake Calculator estimates the recommended daily water consumption to maintain proper hydration based on your body weight and activity level.
Formula
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How to Use?
- Enter your body weight in kg or lbs.
- Select your activity level.
- View recommended water intake in liters, milliliters, and 8-oz cups per day.
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Worked Examples
Example 1
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Why Hydration Matters
Proper water intake supports digestion, circulation, temperature regulation, and overall health. Hydration needs vary with body weight and activity.
Adjusting for Activity
More active individuals require more water. Use the activity level selector to get a personalized recommendation.
Table: Sample Water Intake Recommendations
| Weight (kg) | Activity | Water (L/day) | Cups (8 oz) |
|---|---|---|---|
| 70 | Light | 2.5 | 10 |
| 90 | Very active | 4.1 | 17 |
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FAQs
How much water should I drink daily?
Water needs vary by body weight and activity level; use this calculator for a personalized estimate.
Does activity increase water needs?
Yes, more active people require additional water to compensate for fluid loss from sweating.
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