Sauna Sweat Loss Calculator

Use the calculator to model a real sauna or contrast session. Choose sauna type and temperature, rounds, time in heat, breaks, and optional cold plunge details, then add weigh-in data, drinks consumed, break conditions, steam bursts, and electrolyte products when you want a tighter estimate. The tool returns total sweat produced, net fluid deficit, percent body-mass loss, sodium and electrolyte ranges, targeted fluid replacement, and practical product dosing suggestions for before and after your session.