Is 8 glasses of water a day enough?

Health

Water Intake Calculator

Estimate your daily water needs.

Enter your values below — results update instantly as you type.

Body weight

kg

Activity levelClimate

Daily water intake

2.1 L

In millilitres

2,145 ml

This is a general guideline. Actual needs vary based on diet, health conditions, and pregnancy/nursing status.

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How to use this water intake calculator

Enter your values in the fields above — results update instantly as you type.
Adjust any figure to see how it changes the outcome.
Use Share, Copy, or Print to save your result for later.

Tips

Increase intake during exercise, hot weather, or illness.
Fruits and vegetables also contribute to your daily water intake.

Frequently asked questions

The 8-glass rule is a rough guideline. Actual needs depend on body weight, activity, climate, and diet. Use this calculator for a personalized estimate.

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