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 before kg: 70
- Weight after kg: 69.4
- Fluid consumed liters: 0.5
Results this page provides
- Estimated sweat loss liters
- Replacement target liters
How it works
Weight loss during a session plus fluid intake estimates sweat loss.
Best use cases
Plan hydration after long training sessions.
Limitations
Food, bathroom breaks, scale error, and clothing can affect the estimate.