Daily Water Intake Calculator

Get a rough daily water target from body weight using a common rule of thumb of 35 mL per kilogram. Needs rise with heat, exercise and illness.

Daily Uses

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Get a rough daily water target from body weight using a common rule of thumb of 35 mL per kilogram. Needs rise with heat, exercise and illness.

For general information only, not medical advice. Consult a qualified health professional before making health decisions.

Worked example

Example calculated from the starting values. Enter your own values and press Calculate to get your result.

Water per day2.5 L

Glasses of 250 mL10

With the default inputs (weight = 70 kg), the results are: water per day 2.5 L; glasses of 250 mL 10.

Reference table based on the example values; it is not your calculation result.

What formula does this calculator use?

Water per day = w × 0.035; Glasses of 250 mL = w × 0.035 × 4. Variables: w = weight in kg.

What do I need to enter?

You need weight (kg). Results update as you type.

What is an example result?

With the default inputs (weight = 70 kg), the results are: water per day 2.5 L; glasses of 250 mL 10.

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