HYROX, Fuelled/Sweat check

Sweat Rate
Calculator

Estimate sweat loss from your weight and training conditions, or enter before-and-after weigh-ins for a session-based calculation.

You and the session

kg

Noticeably sweaty, top is wet by the end.

Race pace or a hard simulation, breathing hard.

A typical gym, or an AC event hall in Delhi or Mumbai.

min
ml
Done a real weigh-in? Use that number

Weigh yourself in minimal dry clothing right before and after a session, towelling off sweat first. This gives a better number.

kg
kg

Uses the time and fluid values above.

Estimated sweat rate
- ml/hr
Fill in the form to see your estimate.
Fluid lost this session-
Net deficit after drinking-
Sodium lost-
Sodium / hour-

What to do with this

Your fluid and sodium guide will appear here once you estimate.

CleanLabel°
HYROX, Fuelled

Planning note. The estimate starts from your sweat type - light, average, or heavy - then adjusts for effort, heat, and body size. The weigh-in option uses a simple formula: sweat in litres equals body mass lost plus fluid drunk. Divide by session hours to get your sweat rate.

The sodium figure assumes about 1 g of sodium per litre, bumped to 1.5 g/L if you flag yourself as a salty sweater. True sweat sodium varies a lot between people, so treat this as a planning range, not a clinical test.