Stay hydrated during your endurance race. For you to understand how much fluid you’re your body needs to replace what is lost through sweat, it is important to understand your sweat rate. These fluid calculators are an easy way to help gage your maximum and minimum fluid intake.
To use the calculator:
- Enter your pre-event weight in pounds or kilograms. Weigh yourself, ideally with no clothes on, with an empty bladder before a workout.
- Enter your event length in hours and minutes. Choose a finish time that is reasonable, not ideal or “best-case scenario.”
- Enter your maximum hourly fluid needs.
- Click Calculate.
Your fluid needs will vary with temperature, level of exertion, type of exercise, so to get a truly accurate assessment of your fluid needs, we recommend repeating this test under a variety of conditions. Please use this calculator as a guide.