Free tools
Recovery calculators
Four free calculators that turn spec sheets into your numbers. Use your own electricity rate; every formula and default is shown with its source.
Sauna running cost
kW × minutes × your ¢/kWh
120V vs 240V sauna
circuit · breaker · install cost
5-year cost of ownership
price + power + parts + memberships
Cold plunge vs chest freezer
chiller vs ice vs DIY · 5 years
How they work. Each calculator runs entirely in your browser. Defaults come from makers’ published specs and official electricity data, and every one can be changed. Results are estimates: confirm wiring with a licensed electrician and prices at checkout. How we analyse →