Question 1

What is a Water Intake Calculator?

Accepted Answer

A water intake calculator estimates your daily hydration needs based on body weight and activity level. The general guideline is 35ml per kg of body weight, adjusted upward for exercise and heat.

Question 2

How does the Water Intake Calculator work?

Accepted Answer

Base intake = body weight (kg) × 35 ml Then: Sedentary adjustment: ×1.0, Moderate: ×1.15, Active: ×1.35 Then: Add 500ml per 30 minutes of intense exercise Then: ~20% of daily water comes from food.

Question 3

Can you give an example of how to use the Water Intake Calculator?

Accepted Answer

Example: Input 70kg person, moderate activity gives a result of ~2.8 litres/day (11.2 glasses).

Question 4

Is the Water Intake Calculator free to use?

Accepted Answer

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

Question 5

How accurate is the Water Intake Calculator?

Accepted Answer

Our Water Intake Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Water Intake Calculator

Water Intake Calculator

What is Water Intake Calculator?

How to Use Water Intake Calculator

Example Water Intake Calculator

Water Intake by Body Weight

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