Water Intake Calculator
Estimate how much water you should drink daily.
Result
Results are estimates for general information only and are not professional advice.
Staying hydrated
A common guideline is roughly 30–35 ml of water per kilogram of body weight, plus extra for exercise. This calculator gives a personalised daily estimate. Needs rise in hot weather, during illness and with intense activity.
Frequently Asked Questions
What is the Water Intake Calculator?
Estimate how much water you should drink daily. It runs instantly in your browser and is completely free.
Is the Water Intake Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Water Intake Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.