Water Intake Calculator
A daily water target that fits your body weight and training.
A common rule of thumb is about 33 ml per kg of body weight, plus about half a litre for every hour of exercise. Hot weather, illness and pregnancy raise the need. Food also contains water.
Formula: Water (l) ≈ 0.033 × weight in kg + 0.5 × hours of exercise
Results are estimates for general information, not medical or financial advice.
How it works
- Enter your values The result updates as you type.
- Switch units if needed Metric or US units, where it applies.
- Read the result Nothing is stored or sent anywhere.
FAQ
Is it free?
Yes. No account, no limits.
Is my data stored?
No. The calculation happens in your browser and nothing is sent to a server.