Free Electrolyte Intake calculator with clear step-by-step results.
Sweat carries electrolytes that need replacing during long efforts.
Formula
Sodium ≈ 1,000 mg/L sweat; potassium ≈ 250 mg/L; water ≈ 0.9 × sweat
Estimates are general guidance — consult a healthcare professional for personal medical advice.
Sweat carries electrolytes that need replacing during long efforts.
Individual sweat composition varies widely.