Electrolyte Intake Calculator
Estimates sodium, potassium, and fluid replacement for endurance exercise from hours of activity, using 600 mg sodium, 200 mg potassium, and 0.6 L per hour.
What this calculator does
The Electrolyte Intake Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. Estimates sodium, potassium, and fluid replacement for endurance exercise from hours of activity, using 600 mg sodium, 200 mg potassium, and 0.6 L per hour. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Electrolyte Intake Calculator
The Electrolyte Intake Calculator scales replacement needs with the number of hours you exercise. For each hour it uses 600 mg of sodium, 200 mg of potassium, and 0.6 litres of fluid.
Enter your exercise duration and it multiplies these per-hour figures to give totals.
Formula & Mathematical Calculation
Sodium (mg) = f(Exercise Duration (hours))
Calculated according to standard health formulas implemented in the calculator core.
Calculation Example
For 2 hours of activity the tool multiplies each rate: sodium 2 × 600 = 1200 mg, potassium 2 × 200 = 400 mg, and fluid 2 × 0.6 = 1.2 L.
It reports Sodium 1200 mg, Potassium 400 mg, and Fluid 1.2 L.
Key Benefits
- Scales sodium, potassium, and fluid to your exercise duration
- Uses simple per-hour rates you can see
- Reports all three targets at once
- Handy for planning long training sessions
How to Use this Calculator
-
Enter exercise duration
Type how many hours you will exercise into the Exercise Duration field. -
Calculate
Select Calculate to see sodium, potassium, and fluid totals. -
Review the totals
Read the three metric boxes for sodium in mg, potassium in mg, and fluid in litres.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Electrolyte Intake Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.