How to use this tool
Enter your values, run the tool, then review the result cards. Most tools update automatically when inputs change, so you can test several scenarios quickly.
Example inputs
- Weight kg: 70
- Exercise minutes: 45
Results this page provides
- Water liters/day
How it works
The estimate combines a weight-based baseline with extra fluid for exercise time.
Best use cases
Create a hydration target for normal daily planning.
Limitations
Climate, sweat rate, medical needs, and diet can change fluid requirements.