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Estimate electrolyte needs from weight, activity and sweat — see sodium, potassium, magnesium needs and hydration.
Estimate electrolyte needs from weight, activity and sweat — see sodium, potassium, magnesium needs and hydration.
Enter values above and click Calculate — results will appear here with the formula explained.
Electrolyte needs scale with sweat. Sodium 500mg per hour moderate, potassium 200mg, magnesium 50mg. Low and high adjust 40%.
This is for exercise, not resting. Daily needs are lower: sodium 1500-2300mg, potassium 2600-3400mg, magnesium 310-420mg.
To use the Electrolyte Calculator, enter weight (kg), activity hours/day, sweat level above for an instant result with full breakdown and formula (Sodium 500mg per hour moderate, 300 low, 800 high; Potassium 200mg per hour; Magnesium ...). Adjust values live to compare scenarios, then check the worked example and FAQs below for practical tips and costly mistakes to avoid.
Estimate electrolyte needs from weight, activity and sweat — see sodium, potassium, magnesium needs and hydration. Formula: Sodium 500mg per hour moderate, 300 low, 800 high. Example: With 70kg, 1 hour moderate: sodium 500mg, potassium 200mg, magnesium 50mg extra.
Electrolyte needs scale with sweat. Sodium 500mg per hour moderate, potassium 200mg, magnesium 50mg. Low and high adjust 40%.
This is for exercise, not resting. Daily needs are lower: sodium 1500-2300mg, potassium 2600-3400mg, magnesium 310-420mg.
To use the Electrolyte Calculator, enter weight (kg), activity hours/day, sweat level above for an instant result with full breakdown and formula (Sodium 500mg per hour moderate, 300 low, 800 high; Potassium 200mg per hour; Magnesium ...). Adjust values live to compare scenarios, then check the worked example and FAQs below for practical tips and costly mistakes to avoid.
With 70kg, 1 hour moderate: sodium 500mg, potassium 200mg, magnesium 50mg extra.
Formulas are standard public references (see our methodology). External standards are cited in the text where they apply.
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