Calculator

Hydration & Electrolyte
Calculator.

Estimates fluid and sodium loss for your session and shows how much one serving of PitFuel Electrolytes contributes.

Optional, refines the estimate slightly. Without input, an age- and sex-neutral average is used.
Indoor training often means less airflow, which increases effective heat load even at the same temperature.
Practical self-assessment, not a substitute for a sweat test.
Estimated fluid loss
–
Estimated sodium loss
–
Recommended fluid intake after
–
Sweat rate
–
Coverage from 1 PitFuel serving
Maximum intake safety reference: roughly 7 servings per day (limiting nutrient: magnesium, EFSA guidance value 250 mg/day). This is not a substitute for the recommended intake of 1–2 servings per day – see notes below for details.

30 servings per can · No artificial colors

Refill Lemon-LimeRefill Wild Berry

Important notes

This calculation is a rough, sports-science-based estimate using recognized reference values (incl. the ACSM position stand on fluid replacement in exercise). It is not an individual nutrition plan and not medical advice. Actual needs vary by person, acclimatization, health status and exact training conditions, and can only be determined precisely through an individual sweat test.

Sex, age and indoor/outdoor environment are optional refinements based on the same literature: absolute sweat rate tends to run slightly higher in men, thermoregulation becomes less efficient from roughly age 60, and reduced airflow indoors raises effective heat load versus the same temperature outdoors. These are small, simplified adjustments, not individually validated values.

PitFuel Electrolytes is a food supplement. Recommended intake: 1 serving (10 g) per day, dissolved in enough liquid; on days with intense physical exertion or heavy sweating this may be increased to up to 2 servings (20 g) per day. The recommended intake should not be exceeded. Food supplements are not a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of reach of young children.

Maximum intake: based on established supplement safety reference values, the limiting nutrient is magnesium (EFSA guidance value: 250 mg/day from supplements), which corresponds to a theoretical ceiling of roughly 7 servings per day. This figure is a scientific safety reference, not a recommendation, and does not replace the recommended intake of 1–2 servings per day stated above. Underlying nutrient values are provisional pending final confirmation of the mineral salt forms by the manufacturer.

If you have specific health conditions, are pregnant or breastfeeding, are a child or adolescent, or face unusually high heat or exertion exposure, please consult a doctor or sports medicine professional before adjusting your fluid or electrolyte intake.

Scientific basis: Sawka MN et al., "Exercise and Fluid Replacement", ACSM Position Stand, Medicine & Science in Sports & Exercise, 2007 · Baker LB, "Sweating Rate and Sweat Sodium Concentration in Athletes", Sports Medicine, 2017.