Water Intake Calculator

Estimate daily hydration needs by weight and activity level.

Water Intake Calculator calculator

Estimated daily fluid need (~35 ml per kg base, adjusted for activity). Includes water from food and other drinks.

kg

~2.9 L (2940 ml) per day

12 cups (240 ml) or ~99 fl oz

How To Use

  1. Choose metric (kg) or imperial (lbs) and enter your weight.
  2. Select activity level.
  3. Review recommended daily fluid intake in liters and cups.

What Is Water Intake?

Water intake recommendations are often based on body weight and activity. A common guideline is about 30-35 ml per kg of body weight per day, adjusted up for higher activity or warm climates. This calculator estimates total fluid needs (including water from food and other drinks). Needs vary by individual; thirst and urine color are practical guides. This tool is for general reference only.

Frequently Asked Questions