Electrolyte loss calculator

Sweat loss [l] × Sodium concentration [mg/l]; Sweat loss [l] × Potassium concentration [mg/l]. Concentrations must match your assumed sweat loss. This estimates theoretical losses, not a safe fluid or supplement dose; excessive replacement can also be harmful.

Concentrations must match your assumed sweat loss. This estimates theoretical losses, not a safe fluid or supplement dose; excessive replacement can also be harmful. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Health values are general information, not a diagnosis or personal treatment recommendation.

Yes. Calculations and PDF export work without an account or registration.

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.