Electrolyte Intake
Free Electrolyte Intake calculator with clear step-by-step results.
About Electrolyte Intake
Sweat carries electrolytes that need replacing during long efforts.
Formula
Formula
Sodium ≈ 1,000 mg/L sweat; potassium ≈ 250 mg/L; water ≈ 0.9 × sweat
Worked example
With the default values below, Electrolyte Intake returns Sodium to Replace of 2,000.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Sweat rate (L/hour)minimum 0 L
- 1 L
- Exercise duration (hours)minimum 0
- 2
Results
- Sodium to Replace
- 2,000.00 mg
- Potassium to Replace
- 500.00 mg
- Water to Replace
- 1.8 L
Step by step
- 1Values used
- 2Formula
- 3Sodium to Replace= 2,000 mg
- 4Potassium to Replace= 500 mg
- 5Water to Replace= 1.8 L
Assumptions and limits
- The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- Estimates are general guidance — consult a healthcare professional for personal medical advice.
- This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Estimates are general guidance — consult a healthcare professional for personal medical advice.
Frequently Asked Questions
How does this calculator work?
Sweat carries electrolytes that need replacing during long efforts.
Why does this matter?
Individual sweat composition varies widely.