Calculators
Four free calculators to plan the practical side of heat and cold: sizing, running costs, and the real math behind the purchase. Every one runs 100% in your browser — nothing you type is sent anywhere.
🔥 Sauna heater size
Room dimensions + insulation → the right electric heater kW, BTU/hr, current draw, and suggested breaker size.
💰 5-year cost of ownership
Purchase + install + electricity + maintenance over 5 years, with monthly average and cost per session.
🧊 Cold plunge chiller sizing
Water volume + target temperature + climate → recommended chiller HP and estimated monthly running cost.
⚖️ Sauna vs. gym: 5-year showdown
Gym membership vs. a home sauna over 5 years — see the totals side by side and find your break-even month.
Planning a purchase? Run the sauna buyer's checklist alongside these calculators — it covers the ten things to verify before you spend a dollar.
This guide is for general information only and isn’t medical advice. Talk to your doctor before starting heat or cold therapy.