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Daily Water Intake Calculator

Estimate how much water you should drink each day based on your weight, activity level and climate.

Estimate a sensible daily water intake target based on your body weight, activity level and the climate you live in.

How to use it

  1. 1Enter your weight and choose units.
  2. 2Select your activity level and climate.
  3. 3See your recommended daily water intake.

Your details

Enter your weight, activity level and climate for a hydration target.

Units
kg

Not medical advice

This is a general hydration estimate. People with medical conditions should follow guidance from a doctor.

Result

Recommended daily water intake

2.66 L

In fluid ounces
90 fl oz
In cups
11.2 cups

Based on 33ml per kg of body weight, plus adjustments for activity and climate.

Frequently asked questions

Does coffee or tea count towards water intake?
Most fluids contribute to hydration, but plain water remains the best default choice for this estimate.
Do I need more water when exercising?
Yes, this calculator adds extra fluid for higher activity levels to account for sweat losses.
Is this a medical recommendation?
No, it's a general estimate. People with certain medical conditions should follow guidance from a healthcare provider.

Something wrong with this tool or its numbers?

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