Water Intake Calculator
Estimate a daily water target from body weight.
General estimate only. Individual health needs vary.
How to use the water intake calculator
Enter body weight and daily activity minutes to see a rough fluid target based on a simple weight-and-activity formula.
Example
At 70 kg with no added activity, the tool estimates about 2.5 liters per day.
Good to know
Needs vary with climate, food, health, and exercise. Follow individual medical guidance where relevant.